Which to use
“tern” and “tun” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #40,923
- “tern” frequency rank
- #30,265
- “tun” frequency rank
- 71188
- confusion score
Side-by-Side Comparison
| Feature | tern | tun |
|---|---|---|
| Definition | Any of various seabirds of the subfamily Sterninae (of the family Laridae) that are similar to gulls but are smaller and have a forked tail. | A large cask; an oblong vessel bulging in the middle, like a pipe or puncheon, and girt with hoops; a wine cask. (See a diagram comparing cask sizes.) |
Where the eye mixes tern and tun
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses tern with tun
A purely visual mix-up. tern (/tɜːn/) and tun (/tʌn/) 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 71188, derived from the frequency rank of both members and their visual similarity.
tern is recorded at frequency rank #40,923, classified as anoun, pronounced /tɜːn/. tun is at rank #30,265, tagged as anoun, pronounced /tʌn/.
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 71188, this pair ranks #47,669 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of tern vs tun
Shared letters: nt. Private to "tern": er. Private to "tun": u.
"tern" · 4 letters · shape CVCC · "tun" · 3 letters · shape CVC
Known mistypes of this pair
- tern ← etrn · tenr · ternn · terrn · tren · ttern
Frequently Asked Questions
Can "tern" and "tun" be used interchangeably?
Which is more common, "tern" or "tun"?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "tern" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "tun" - compare definitions side by side with the headword page. Word entry
- This pair ranks #47,669 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "tern" and "tun" also get mixed up with nearby pairs, the highest-scored neighbour is "tern vs Thun". 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 #47,669 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.