Which to use
“thumb” is a noun and “thunk” is a verb - they look or sound alike but fill different roles in a sentence.
- #7,071
- “thumb” frequency rank
- #47,382
- “thunk” frequency rank
- 54453
- confusion score
Side-by-Side Comparison
| Feature | thumb | thunk |
|---|---|---|
| Definition | The shortest and thickest digit of the hand that for humans has the most mobility and can be made to oppose (moved to touch) all of the other fingers. | past participle of think |
Where the eye mixes thumb and thunk
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Look-alike desk: thumb vs thunk
These two trip readers on the page rather than in the ear: thumb is /θʌm/ while thunk is /θʌŋk/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 54453, derived from the frequency rank of both members and their visual similarity.
thumb is recorded at frequency rank #7,071, classified as anoun, pronounced /θʌm/. thunk is at rank #47,382, tagged as averb, pronounced /θʌŋk/.
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 54453, this pair ranks #141,001 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of thumb vs thunk
Shared letters: htu. Private to "thumb": bm. Private to "thunk": kn.
"thumb" · 5 letters · shape CCVCC · "thunk" · 5 letters · shape CCVCC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "thumb" for "thunk" ever safe?
Which is more common, "thumb" or "thunk"?
After this comparison
Eye-level mix-up between "thumb" and "thunk" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "thumb" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "thunk" - compare definitions side by side with the headword page. Word entry
- This pair ranks #141,001 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "thumb" and "thunk" also get mixed up with nearby pairs, the highest-scored neighbour is "Thun vs thunk". 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 #141,001 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.