cmonvscobWhat's the difference?

Quick tell: cmon is a contraction, cob is a noun, so they fill different roles in a sentence.

Which to use

“cmon” is a contraction and “cob” is a noun - they look or sound alike but fill different roles in a sentence.

#27,403
“cmon” frequency rank
#27,404
“cob” frequency rank
54807
confusion score

Side-by-Side Comparison

Feature cmon cob
Definition Alternative spelling of c'mon. A corncob.

Letter map: cmon vs cob

Shared letters muted; letters that set cmon and cob apart highlighted. Shared run: 2.

4 ch
cmon
3 ch
cob

Role in the sentence - cmon and cob

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: cmon is acontraction and cobanoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 54807, derived from the frequency rank of both members and their visual similarity.

cmon is recorded at frequency rank #27,403, classified as acontraction. cob is at rank #27,404, tagged as anoun, pronounced /kɑb/.

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 54807, this pair ranks #138,339 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of cmon vs cob

Shared letters: co. Private to "cmon": mn. Private to "cob": b.

"cmon" · 4 letters · shape CCVC  ·  "cob" · 3 letters · shape CVC

Known mistypes of this pair

  • cmonccmon · cmmon · cmno · cmonn · comn · mcon

Frequently Asked Questions

Is swapping "cmon" for "cob" ever safe?
No - they are not even the same part of speech. "cmon" is a contraction and "cob" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary English text, does "cmon" or "cob" show up more?
"cmon" is the more common of the two: it sits at frequency rank #27,403 in our English list, against #27,404 for "cob". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Done with this confusable. These links stay specific to "cmon" and "cob".

  • Full dictionary entry for "cmon" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "cob" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #138,339 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "cmon" and "cob" also get mixed up with nearby pairs, the highest-scored neighbour is "CGT vs cob". 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 #138,339 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