oco vs óleo, What's the Difference?

Which to use

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

#27,951
“oco” frequency rank: #2,919
“óleo” frequency rank: 30870
confusion score

Side-by-Side Comparison

Feature	oco	óleo
Definition	que não tem miolo	substância viscosa que não se mistura com a água

Letter map: oco vs óleo

Shared letters muted; letters that set oco and óleo apart highlighted. Shared run: 1.

3 ch

oco

4 ch

óleo

Grammar separator: oco vs óleo

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: oco is anadjective and óleoanoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 30870, derived from the frequency rank of both members and their visual similarity.

oco is recorded at frequency rank #27,951, classified as anadj, pronounced /ˈo.ku/. óleo is at rank #2,919, 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 30870, this pair ranks #37,378 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of oco vs óleo

Shared letters: o. Private to "oco": c. Private to "óleo": eló.

"oco" · 3 letters · shape VCV · "óleo" · 4 letters · shape VCVV

Frequently Asked Questions

Do "oco" and "óleo" mean the same thing in a sentence?

No - they are not even the same part of speech. "oco" is an adjective and "óleo" a noun, so a sentence built for one is usually ungrammatical with the other.

In ordinary Portuguese text, does "oco" or "óleo" show up more?

"óleo" is the more common of the two: it sits at frequency rank #2,919 in our Portuguese list, against #27,951 for "oco". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Done with this confusable. These links stay specific to "oco" and "óleo".

Full dictionary entry for "oco" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "óleo" - compare definitions side by side with the headword page. Word entry
This pair ranks #37,378 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"oco" and "óleo" also get mixed up with nearby pairs, the highest-scored neighbour is "oco vs oni". Nearby pair

Confusion rank #37,378 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.