Which to use
“coaster” and “cotter” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #11,357
- “coaster” frequency rank
- #37,401
- “cotter” frequency rank
- 48758
- confusion score
Side-by-Side Comparison
| Feature | coaster | cotter |
|---|---|---|
| Definition | A person who originates from or inhabits a coastal area. | A pin or wedge inserted through a slot to hold machine parts together. |
Where the eye mixes coaster and cotter
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence.
Why the eye confuses coaster with cotter
A purely visual mix-up. coaster (/ˈkəʊ̯s.tə/) and cotter (/kɒtə/) 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 48758, derived from the frequency rank of both members and their visual similarity.
coaster is recorded at frequency rank #11,357, classified as anoun, pronounced /ˈkəʊ̯s.tə/. cotter is at rank #37,401, tagged as anoun, pronounced /kɒtə/.
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 48758, this pair ranks #190,034 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of coaster vs cotter
Shared letters: ceort. Private to "coaster": as. Private to "cotter": -.
"coaster" · 7 letters · shape CVVCCVC · "cotter" · 6 letters · shape CVCCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "coaster" for "cotter" ever safe?
Frequency check: "coaster" vs "cotter" - which ranks higher?
What to do next
Eye-level mix-up between "coaster" and "cotter" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "coaster" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "cotter" - compare definitions side by side with the headword page. Word entry
- This pair ranks #190,034 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "coaster" and "cotter" 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 #190,034 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.