Which to use
“tuff” and “tui” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #29,499
- “tuff” frequency rank
- #38,658
- “tui” frequency rank
- 68157
- confusion score
Side-by-Side Comparison
| Feature | tuff | tui |
|---|---|---|
| Definition | A light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel. | A species of honeyeater, Prosthemadera novaeseelandiae, a bird which is endemic to New Zealand. |
Where the eye mixes tuff and tui
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses tuff with tui
A purely visual mix-up. tuff (/tʌf/) and tui (/ˈtʉi/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 68157, derived from the frequency rank of both members and their visual similarity.
tuff is recorded at frequency rank #29,499, classified as anoun, pronounced /tʌf/. tui is at rank #38,658, tagged as anoun, pronounced /ˈtʉi/.
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 68157, this pair ranks #60,192 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of tuff vs tui
Shared letters: tu. Private to "tuff": f. Private to "tui": i.
"tuff" · 4 letters · shape CVCC · "tui" · 3 letters · shape CVV
Known mistypes of this pair
- tuff ← tfuf · ttuff · tuf · utff
Frequently Asked Questions
Can "tuff" and "tui" be used interchangeably?
Frequency check: "tuff" vs "tui" - which ranks higher?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "tuff" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "tui" - compare definitions side by side with the headword page. Word entry
- This pair ranks #60,192 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "tuff" and "tui" also get mixed up with nearby pairs, the highest-scored neighbour is "tuft vs tui". 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 #60,192 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.