costsvscoursTell them apart

Which to use

“costs” and “cours” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#1,163
“costs” frequency rank
#47,550
“cours” frequency rank
48713
confusion score

Side-by-Side Comparison

Feature costs cours
Definition plural of cost three-month unit of television broadcasting corresponding to a natural season.

Letter map: costs vs cours

Shared letters muted; letters that set costs and cours apart highlighted. Shared run: 3. costs (CVCCC) and cours (CVVCC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

5 ch
costs
5 ch
cours

Pair insight - costs / cours

costs and cours are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 48713, derived from the frequency rank of both members and their visual similarity.

costs is recorded at frequency rank #1,163, classified as anoun, pronounced /ˈkɔsts/. cours is at rank #47,550, tagged as anoun.

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 48713, this pair ranks #190,449 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of costs vs cours

Shared letters: cos. Private to "costs": t. Private to "cours": ru.

"costs" · 5 letters · shape CVCCC  ·  "cours" · 5 letters · shape CVVCC

Known mistypes of this pair

  • costs ← ccosts · cossts · costss · costts · cotss · csots · ocsts
  • cours ← ccours · corus · courrs · courss · cousr · cuors

Frequently Asked Questions

Do "costs" and "cours" mean the same thing in a sentence?
No. They share most of their letters but differ in 2 positions, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.
Frequency check: "costs" vs "cours" - which ranks higher?
"costs" is the more common of the two: it sits at frequency rank #1,163 in our English list, against #47,550 for "cours". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Done with this confusable. These links stay specific to "costs" and "cours".

  • Full dictionary entry for "costs" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "cours" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #190,449 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "costs" and "cours" also get mixed up with nearby pairs, the highest-scored neighbour is "cours vs Coutts". 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 #190,449 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