BossAI Custom Dictionary: How to Add Words and Dictate with Perfect Accuracy

If your dictation app keeps mangling product names, medical terms, or client names — the BossAI custom dictionary is the fix most users set up once and never think about again.

Key Takeaways

• A custom dictionary lets you teach BossAI your industry-specific terms, proper nouns, and frequently used phrases for perfect transcription every time.
• Custom dictionaries sync across all your devices, so BossAI understands your unique vocabulary whether you're dictating on Windows, Mac, or iOS.
• Adding just 20-50 key terms to your custom dictionary can reduce correction time by up to 60% and improve overall dictation accuracy.
• Unlike built-in spell checkers, BossAI's custom dictionary works proactively, recognizing your words before transcribing, not after.
• You can target different vocabulary sets — medical terminology, tech jargon, client names — all within a single dictionary that travels with your account.

Contents

• What Is a Custom Dictionary in BossAI?
• Why Would You Create a Custom Dictionary for Dictation?
• What Types of Words Should You Add to Your BossAI Dictionary?
• How Do You Add Words to Your BossAI Custom Dictionary?
• How Does a Custom Dictionary Improve Your Dictation Accuracy?
• Can You Import or Sync Your BossAI Custom Dictionary Across Devices?
• What's the Difference Between Custom Dictionary and Built-in Spell Check?
• Frequently Asked Questions

What Is a Custom Dictionary in BossAI?

A custom dictionary in BossAI is a personal vocabulary list that trains the app to recognize words outside its default language model — including technical jargon, brand names, medical terms, client names, and abbreviations. Unlike autocorrect, which tries to fix what it doesn't recognize, BossAI's custom dictionary proactively transcribes your words correctly the first time.

This is one of the most underused features in any dictation app — and one of the highest-value ones. When you're a developer dictating API endpoints, a doctor recording patient notes with condition names, or a consultant dropping your client's brand into every other sentence, the default language model simply doesn't know your words.

BossAI's custom dictionary trains the app on your unique vocabulary so it transcribes correctly from the first word.

The custom dictionary is available in BossAI's Settings panel across iOS, macOS, and Windows. Free users can add up to 10 words; Pro users get full dictionary access with no cap. If you're evaluating custom dictionary apps more broadly, BossAI's implementation stands out for its cross-platform sync and proactive — not reactive — recognition model.

Why Would You Create a Custom Dictionary for Dictation?

You need a custom dictionary the moment your dictation app starts guessing your words and guessing wrong. Technical fields, niche industries, and any workflow involving proper nouns — product names, client companies, medical conditions, legal terminology — hit this wall almost immediately. The result is a transcription full of corrections that take longer to fix than it would have taken to type.

Consider a medical professional dictating a patient note with terms like "myocardial infarction," "acetylcholinesterase," or an unusual patient name like "Persephone Trevanthan." A standard dictation engine has no idea what those are. The doctor either corrects every line or never reaches the efficiency dictation promises.

Key insight: The #1 reason professionals abandon dictation apps is vocabulary accuracy — not speed, not UI, not price. Solving vocabulary is solving retention.

BossAI's custom dictionary eliminates this friction entirely. Once you add your terms, BossAI recognizes them and transcribes them correctly on the first pass. To understand how BossAI works as a whole before diving into custom vocabulary, see our full product overview.

Who Benefits Most from Custom Dictionaries?

Power users who unlock maximum value from the BossAI custom dictionary tend to come from specific professional contexts:

• Medical and healthcare professionals — condition names, drug names, procedure codes, patient identifiers
• Developers and engineers — function names, API endpoints, library names, technical acronyms
• Legal professionals — case citations, legal terminology, client and firm names
• Sales and account teams — prospect company names, internal CRM terminology, product names
• Content creators and marketers — brand names, campaign names, influencer handles, unique product terms

What Types of Words Should You Add to Your BossAI Dictionary?

The most effective custom dictionary entries fall into five categories: proper nouns (people and company names), domain-specific terminology (medical, legal, or technical), product and brand names (yours and your clients'), abbreviations and acronyms used verbally, and text expansion shortcuts that trigger inline word-level replacements.

Proper Nouns

Names are the first place standard dictation models break down. Your client "Nghia Tran" becomes "Mia Tran." The CEO "Dhruv Malhotra" becomes "Drew Malhotra." Add every proper noun you'll dictate regularly — and add variations if you say the name differently in different contexts.

Industry-Specific Terminology

These are the words that live outside mainstream language models. Your field's specialized vocabulary — pharmaceutical compound names, legal Latin phrases, DevOps toolchain names — belongs in your dictionary. Generic models haven't been trained on them at sufficient frequency to get them right.

Abbreviations and Acronyms

Spoken abbreviations are transcribed inconsistently without custom entries. "SQL" may appear as "sequel." "SLA" might render as "sla." Adding these ensures correct capitalization and formatting every time you dictate an acronym naturally.

Text Expansion Shortcuts

Advanced users create shortcut triggers for inline expansions: dictate "ty" → expands to "Thank you for your email." This differs from BossAI's Clips feature, which handles full multi-line blocks — dictionary shortcuts handle inline word-level replacements without leaving your current text field.

How Do You Add Words to Your BossAI Custom Dictionary?

BossAI's dictionary panel lets you add terms in seconds — they're active immediately in your next dictation.

Adding words to BossAI's custom dictionary takes under 30 seconds per entry. Open BossAI Settings, navigate to Custom Dictionary, and type the exact term you want recognized. BossAI stores it immediately and begins recognizing it in your next dictation session — no retraining, no restart required.

Here's the step-by-step process:

1. Open BossAI on iOS, macOS, or Windows
2. Go to Settings — gear icon on desktop, or the Settings tab in the iOS keyboard
3. Select Custom Dictionary from the settings menu
4. Tap "Add Word" and type your term exactly as you want it transcribed
5. Save — the entry is active immediately

Tips for Building an Effective Dictionary

A smart strategy beats ad-hoc additions every time:

• Audit after one week — review every correction you made, then batch-add those words
• Add variations — if you say "iOS" and "iOS app" in different contexts, add both
• Start with 20-50 high-frequency terms — you'll see an immediate and dramatic reduction in correction time
• Include alternate spellings for names that can be rendered multiple ways

By the numbers: Adding just 20-50 key terms to your BossAI custom dictionary can reduce manual correction time by up to 60%, based on user-reported accuracy improvements across professional dictation workflows.

How Does a Custom Dictionary Improve Your Dictation Accuracy?

BossAI's custom dictionary improves dictation accuracy by inserting your vocabulary into the recognition pass before output — meaning the model knows your terms exist, how they're spelled, and how they should appear in context. This proactive recognition is fundamentally different from spell check, which catches errors after transcription is already complete.

When you speak a word in your custom dictionary, BossAI:

1. Recognizes the phoneme pattern as a candidate match
2. Cross-references it against your custom word list alongside the standard model
3. Outputs the correctly spelled, correctly formatted version

This happens within BossAI's ~300ms AI enhancement window — the same pass that removes filler words and corrects grammar. There's no additional lag, no second processing round.

BossAI's AI enhancement window handles custom dictionary matching in the same 300ms pass — no extra lag, just correct output.

The accuracy gains are most dramatic for rare proper nouns and compound technical terms. Words like "acetaminophen," "Kubernetes," or "Schwarzenegger" that would trip up any generic model get transcribed correctly every time once added. For a full comparison of how BossAI handles transcription accuracy against Dragon, Whisper, and other tools, see the BossAI accuracy guide.

Bottom line: Custom dictionary isn't a workaround for poor transcription — it's the professional configuration layer that turns a capable dictation app into one that knows your world.

Can You Import or Sync Your BossAI Custom Dictionary Across Devices?

BossAI syncs your custom dictionary automatically across all connected devices — iOS, macOS, and Windows. When you add a term on your iPhone, it's available the next time you dictate on your Mac or Windows PC. There's no manual export, no CSV to manage, and no platform-specific dictionary to maintain separately.

This is a meaningful differentiator. Many dictation apps maintain separate vocabularies per platform, meaning you duplicate work on each device. BossAI treats your dictionary as part of your account — it travels with you.

BossAI's custom dictionary syncs automatically across iOS, macOS, and Windows — add a word once, use it everywhere.

Device Sync: BossAI vs. Competitors

Feature	BossAI	WisprFlow	Superwhisper	Willow
Custom dictionary	✅	✅	✅	✅
Cross-platform auto-sync	✅ Yes	✅ Yes	Limited	✅ Yes
iOS + macOS + Windows	✅ All 3	✅ All 3	✅ All 3	✅ All 3
Manual re-entry required	❌ No	Unknown	Yes (some)	No
Android support	❌	❌	❌	❌

For platform-specific details — including how custom dictionary access works via the system tray hotkey on Windows — see the BossAI for Windows guide.

What's the Difference Between Custom Dictionary and Built-in Spell Check?

The difference is timing and intent. Built-in spell check catches errors after text is produced — it's reactive. BossAI's custom dictionary prevents errors from occurring — it's proactive. Spell check doesn't know your technical terms exist; it just flags unfamiliar words as wrong. The custom dictionary tells BossAI these words exist and exactly how to render them.

Side-by-Side Comparison

Behavior	Custom Dictionary	Built-in Spell Check
When it acts	During transcription (pre-output)	After text is displayed
Knows your terms	✅ Yes — you trained it	❌ No — flags as unknown
Industry terms	✅ Recognized correctly	❌ Marked as misspelled
Proper nouns	✅ Transcribed as added	❌ Auto-corrected wrong
Abbreviations	✅ Formatted as defined	❌ Inconsistent output
Requires manual fix	❌ None	✅ User must accept/reject

This distinction matters most in professional contexts where a wrong word isn't just an inconvenience — it's a credibility problem. A legal document with "tortfeasor" auto-corrected to something else, or a medical note with a condition name garbled, can have real consequences.

The custom dictionary also enables text expansion that spell check can never provide. Power users who want to explore BossAI's full advanced customization features — including how Boss Mode reads your screen to generate contextually aware replies — will find that custom dictionary mastery is the first step. When you're evaluating competing dictation solutions or looking at what is better than Wispr Flow for professional vocabulary handling, BossAI's proactive custom dictionary combined with cross-platform sync is a capability that compared to other dictation apps stands apart.

---

Try BossAI Free

A custom dictionary that syncs across iOS, Mac, and Windows without manual re-entry — with recognition happening in the same 300ms pass that handles grammar and filler removal. Download BossAI free and add your first terms in under two minutes.

Download BossAI Free

---

Frequently Asked Questions

What is BossAI?

BossAI is an AI-powered voice keyboard for iOS, macOS, and Windows that replaces typing with voice dictation. It transcribes speech in real time, removes filler words automatically, rewrites text in different tones with one tap, and includes Boss Mode — a screen-reading feature that reads your screen to generate contextual replies without copy-pasting.

How many words can I add to the BossAI custom dictionary?

Free users can add up to 10 words to the BossAI custom dictionary. Pro subscribers get unlimited entries with no cap on dictionary size. If you regularly work with specialized terminology, upgrading to Pro is the practical choice — even 20 to 50 well-chosen terms can reduce your correction time by up to 60%.

Does BossAI's custom dictionary sync across iOS, Mac, and Windows?

Yes. BossAI syncs your custom dictionary automatically across all connected devices. When you add a term on one platform, it's immediately available on all others without manual export or re-entry. Your vocabulary follows your account wherever BossAI is installed.

Can I add medical or legal terminology to BossAI's dictionary?

Yes. BossAI's custom dictionary accepts any term you enter — clinical drug names, medical procedures, legal Latin phrases, and case citations. There are no restrictions on what types of words you can add. Medical and legal professionals are among the highest-value users of this feature.

What happens if BossAI still mispronounces a word after adding it to my dictionary?

Verify the word is saved exactly as you want it to appear — check capitalization and spelling in your dictionary settings. If the word is phonetically ambiguous (sounds identical to a common word), BossAI may occasionally favor the more common candidate. Adding the term with more specific formatting or using a text expansion shortcut can resolve the ambiguity.

Is the BossAI custom dictionary available on the free plan?

Yes, with a limit. Free users can add up to 10 words — enough to cover your most frequently mispronounced terms and test the feature's impact. The Pro plan removes this limit entirely, allowing an unlimited custom word list with full cross-device sync.

What platforms does BossAI support?

BossAI is available on iOS (App Store), macOS (App Store and direct download), and Windows (Microsoft Store). Android is not currently supported. The iOS version works as a full keyboard replacement so you can dictate in any app without switching.