Which to use
“cotter” and “crater” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #37,401
- “cotter” frequency rank
- #13,893
- “crater” frequency rank
- 51294
- confusion score
Side-by-Side Comparison
| Feature | cotter | crater |
|---|---|---|
| Definition | A pin or wedge inserted through a slot to hold machine parts together. | A hemispherical pit created by the impact of a meteorite or other object. |
Where the eye mixes cotter and crater
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. cotter (CVCCVC) and crater (CCVCVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Look-alike desk: cotter vs crater
A purely visual mix-up. cotter (/kɒtə/) and crater (/ˈkɹeɪ.tə(ɹ)/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 51294, derived from the frequency rank of both members and their visual similarity.
cotter is recorded at frequency rank #37,401, classified as anoun, pronounced /kɒtə/. crater is at rank #13,893, tagged as anoun, pronounced /ˈkɹeɪ.tə(ɹ)/.
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 51294, this pair ranks #166,712 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of cotter vs crater
Shared letters: cert. Private to "cotter": o. Private to "crater": a.
"cotter" · 6 letters · shape CVCCVC · "crater" · 6 letters · shape CCVCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "cotter" for "crater" ever safe?
Frequency check: "cotter" vs "crater" - which ranks higher?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "cotter" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "crater" - compare definitions side by side with the headword page. Word entry
- This pair ranks #166,712 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "cotter" and "crater" also get mixed up with nearby pairs, the highest-scored neighbour is "cotter vs cower". 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 #166,712 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.