thumbvsThunWhich spelling fits?

Quick tell: thumb is a noun, Thun is a name, so they fill different roles in a sentence.

Which to use

“thumb” is a noun and “Thun” is a name - they look or sound alike but fill different roles in a sentence.

#7,071
“thumb” frequency rank
#47,962
“Thun” frequency rank
55033
confusion score

Side-by-Side Comparison

Feature thumb Thun
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. A city and municipality of Bern canton, Switzerland.

Letter map: thumb vs Thun

Shared letters muted; letters that set thumb and Thun apart highlighted. Shared run: 3.

5 ch
thumb
4 ch
Thun

Part-of-speech tell for thumb / Thun

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: thumb is anoun and Thunaname. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 55033, 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/. Thun is at rank #47,962, tagged as aname.

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 55033, this pair ranks #136,648 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of thumb vs Thun

Shared letters: htu. Private to "thumb": bm. Private to "Thun": n.

"thumb" · 5 letters · shape CCVCC  ·  "Thun" · 4 letters · shape CCVC

Known mistypes of this pair

  • thumbhtumb · thhumb · thmub · thubm · thumbb · thummb · tthumb · tuhmb
  • Thunhtun · thhun · thnu · thunn · tthun · tuhn

Frequently Asked Questions

Do "thumb" and "Thun" mean the same thing in a sentence?
No - they are not even the same part of speech. "thumb" is a noun and "Thun" a name, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "thumb" vs "Thun" - which ranks higher?
"thumb" is the more common of the two: it sits at frequency rank #7,071 in our English list, against #47,962 for "Thun". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pair "thumb" vs "Thun" is on the table, pick a follow-up below.

  • Full dictionary entry for "thumb" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "Thun" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #136,648 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "thumb" and "Thun" 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 #136,648 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list