cercovscertosTell them apart

Quick tell: cerco is a noun, certos is an adjective, so they fill different roles in a sentence.

Which to use

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

#6,512
“cerco” frequency rank
#2,359
“certos” frequency rank
8871
confusion score

Side-by-Side Comparison

Feature cerco certos
Definition ato de cercar plural de certo

Where the eye mixes cerco and certos

Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.

5 ch
cerco
6 ch
certos

Why the eye confuses cerco with certos

These two trip readers on the page rather than in the ear: cerco is /ˈseɾ.ku/ while certos is /ˈsɛrtuʃ/. 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 (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 8871, derived from the frequency rank of both members and their visual similarity.

cerco is recorded at frequency rank #6,512, classified as anoun, pronounced /ˈseɾ.ku/. certos is at rank #2,359, tagged as anadj, pronounced /ˈsɛrtuʃ/.

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 8871, this pair ranks #64,753 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of cerco vs certos

Shared letters: ceor. Private to "cerco": -. Private to "certos": st.

"cerco" · 5 letters · shape CVCCV  ·  "certos" · 6 letters · shape CVCCVC

Known mistypes of this pair

  • cercoccerco · cecro · cercco · ceroc · cerrco · creco · ecrco
  • certosccertos · cerots · cerrtos · certoss · certso · certtos · cetros · cretos

Frequently Asked Questions

Is swapping "cerco" for "certos" ever safe?
No - they are not even the same part of speech. "cerco" is a noun and "certos" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary Portuguese text, does "cerco" or "certos" show up more?
"certos" is the more common of the two: it sits at frequency rank #2,359 in our Portuguese list, against #6,512 for "cerco". 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 "cerco" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "certos" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #64,753 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "cerco" and "certos" also get mixed up with nearby pairs, the highest-scored neighbour is "cerco vs cerda". 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 #64,753 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