ocovsoieWhat's the difference?

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

Which to use

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

#27,951
“oco” frequency rank
#30,656
“oie” frequency rank
58607
confusion score

Side-by-Side Comparison

Feature oco oie
Definition que não tem miolo ganso

Where the eye mixes oco and oie

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch
oco
3 ch
oie

Why the eye confuses oco with oie

These two trip readers on the page rather than in the ear: oco is /ˈo.ku/ while oie is /wa/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 58607, 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/. oie is at rank #30,656, tagged as anoun, pronounced /wa/.

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 58607, this pair ranks #8,649 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of oco vs oie

Shared letters: o. Private to "oco": c. Private to "oie": ei.

"oco" · 3 letters · shape VCV  ·  "oie" · 3 letters · shape VVV

Frequently Asked Questions

Is swapping "oco" for "oie" ever safe?
No - they are not even the same part of speech. "oco" is an adjective and "oie" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary Portuguese text, does "oco" or "oie" show up more?
"oco" is the more common of the two: it sits at frequency rank #27,951 in our Portuguese list, against #30,656 for "oie". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Eye-level mix-up between "oco" and "oie" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "oco" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "oie" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #8,649 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "oco" and "oie" also get mixed up with nearby pairs, the highest-scored neighbour is "oie vs oni". Nearby pair

Confusion rank #8,649 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