coinvsCuiWhich spelling fits?

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

Which to use

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

#5,201
“coin” frequency rank
#39,761
“Cui” frequency rank
44962
confusion score

Side-by-Side Comparison

Feature coin Cui
Definition A piece of currency, usually metallic and in the shape of a disc, but sometimes polygonal, or with a hole in the middle. A surname from Mandarin.

Letter map: coin vs Cui

Shared letters muted; letters that set coin and Cui apart highlighted. Shared run: 2.

4 ch
coin
3 ch
Cui

Part-of-speech tell for coin / Cui

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: coin is anoun and Cuianame. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 44962, derived from the frequency rank of both members and their visual similarity.

coin is recorded at frequency rank #5,201, classified as anoun, pronounced /kɔɪn/. Cui is at rank #39,761, 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 44962, this pair ranks #225,711 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of coin vs Cui

Shared letters: ci. Private to "coin": no. Private to "Cui": u.

"coin" · 4 letters · shape CVVC  ·  "Cui" · 3 letters · shape CVV

Known mistypes of this pair

  • coinccoin · cion · coinn · coni · ocin

Frequently Asked Questions

Is swapping "coin" for "Cui" ever safe?
No - they are not even the same part of speech. "coin" is a noun and "Cui" a name, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "coin" or "Cui"?
"coin" is the more common of the two: it sits at frequency rank #5,201 in our English list, against #39,761 for "Cui". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Pair "coin" vs "Cui" is on the table, pick a follow-up below.

  • Full dictionary entry for "coin" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "Cui" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #225,711 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "coin" and "Cui" also get mixed up with nearby pairs, the highest-scored neighbour is "CGT vs Cui". 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 #225,711 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