certovscorsoWhich spelling fits?

Quick tell: certo is a adjective, corso is a noun, so they fill different roles in a sentence.

Which to use

“certo” is an adjective and “corso” is a noun - they look or sound alike but fill different roles in a sentence.

#326
“certo” frequency rank
#35,518
“corso” frequency rank
35844
confusion score

Side-by-Side Comparison

Feature certo corso
Definition verdadeiro, evidente corso

Letter map: certo vs corso

Shared letters muted; letters that set certo and corso apart highlighted. Shared run: 3.

5 ch
certo
5 ch
corso

Part-of-speech tell for certo / corso

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: certo is anadjective and corsoanoun. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 35844, derived from the frequency rank of both members and their visual similarity.

certo is recorded at frequency rank #326, classified as anadj, pronounced /ˈsɛɹ.tʊ/. corso is at rank #35,518, 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 35844, this pair ranks #31,116 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of certo vs corso

Shared letters: cor. Private to "certo": et. Private to "corso": s.

"certo" · 5 letters · shape CVCCV  ·  "corso" · 5 letters · shape CVCCV

Known mistypes of this pair

  • certoccerto · cerot · cerrto · certto · cetro · creto · ecrto
  • corsoccorso · coros · corrso · corsso · cosro · croso · ocrso

Frequently Asked Questions

Is swapping "certo" for "corso" ever safe?
No - they are not even the same part of speech. "certo" is an adjective and "corso" a noun, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "certo" vs "corso" - which ranks higher?
"certo" is the more common of the two: it sits at frequency rank #326 in our Portuguese list, against #35,518 for "corso". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

You've compared "certo" and "corso". Here's where to go from here.

  • Full dictionary entry for "certo" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "corso" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #31,116 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "certo" and "corso" also get mixed up with nearby pairs, the highest-scored neighbour is "corso vs cursor". 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 #31,116 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list