Which to use
“dual” is an adjective and “dun” is a noun - they look or sound alike but fill different roles in a sentence.
- #19,126
- “dual” frequency rank
- #45,320
- “dun” frequency rank
- 64446
- confusion score
Side-by-Side Comparison
| Feature | dual | dun |
|---|---|---|
| Definition | composto de duas partes | penugem imatura em pássaros jovens |
Where the eye mixes dual and dun
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. dual runs 4 letters (CVVC) against dun's 3 (CVC) - the length gap alone is often enough to separate them once you know to check it.
Visual trap between dual and dun
These two trip readers on the page rather than in the ear: dual is /du.ˈaw/ while dun is /duːn/, [d̥uːˀn]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 64446, derived from the frequency rank of both members and their visual similarity.
dual is recorded at frequency rank #19,126, classified as anadj, pronounced /du.ˈaw/. dun is at rank #45,320, tagged as anoun, pronounced /duːn/, [d̥uːˀn].
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 64446, this pair ranks #5,774 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.
Orthographic DNA of dual vs dun
Shared letters: du. Private to "dual": al. Private to "dun": n.
"dual" · 4 letters · shape CVVC · "dun" · 3 letters · shape CVC
Known mistypes of this pair
- dual ← daul · ddual · duall · dula · udal
Frequently Asked Questions
Is swapping "dual" for "dun" ever safe?
Which is more common, "dual" or "dun"?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "dual" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "dun" - compare definitions side by side with the headword page. Word entry
- This pair ranks #5,774 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "dual" and "dun" also get mixed up with nearby pairs, the highest-scored neighbour is "dat vs dun". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #5,774 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.