concurvscontourWhat's the difference?

Quick tell: concur is a verb, contour is a noun, so they fill different roles in a sentence.

Which to use

“concur” is a verb and “contour” is a noun - they look or sound alike but fill different roles in a sentence.

#22,936
“concur” frequency rank
#17,806
“contour” frequency rank
40742
confusion score

Side-by-Side Comparison

Feature concur contour
Definition To agree (in action or opinion); to have a common opinion; to coincide; to correspond. An outline, boundary or border, usually of curved shape.

Where the eye mixes concur and contour

Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. concur runs 6 letters (CVCCVC) against contour's 7 (CVCCVVC) - the length gap alone is often enough to separate them once you know to check it.

6 ch
concur
7 ch
contour

Look-alike desk: concur vs contour

These two trip readers on the page rather than in the ear: concur is /kəŋˈkɝ/ while contour is /ˈkɒntɔː(ɹ)/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 40742, derived from the frequency rank of both members and their visual similarity.

concur is recorded at frequency rank #22,936, classified as averb, pronounced /kəŋˈkɝ/. contour is at rank #17,806, tagged as anoun, pronounced /ˈkɒntɔː(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 40742, this pair ranks #264,794 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of concur vs contour

Shared letters: cnoru. Private to "concur": -. Private to "contour": t.

"concur" · 6 letters · shape CVCCVC  ·  "contour" · 7 letters · shape CVCCVVC

Known mistypes of this pair

  • concur ← cconcur · cnocur · cocnur · conccur · concru · concurr · conncur · conucr
  • contour ← ccontour · cnotour · conntour · conotur · contoru · contourr · conttour · contuor

Frequently Asked Questions

Is swapping "concur" for "contour" ever safe?
No - they are not even the same part of speech. "concur" is a verb and "contour" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary English text, does "concur" or "contour" show up more?
"contour" is the more common of the two: it sits at frequency rank #17,806 in our English list, against #22,936 for "concur". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "concur" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "contour" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #264,794 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "concur" and "contour" also get mixed up with nearby pairs, the highest-scored neighbour is "concur vs cour". 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 #264,794 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