oco vs on, What's the Difference?

Which to use

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

#27,951
“oco” frequency rank: #675
“on” frequency rank: 28626
confusion score

Side-by-Side Comparison

Feature	oco	on
Definition	que não tem miolo	ligado, ativo (na internet)

Letter map: oco vs on

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

3 ch

oco

2 ch

Spelling & dictionary notes on oco vs on

oco and on are indexed as a confusable Portuguese pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 28626, 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/. on is at rank #675, tagged as anadj.

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 28626, this pair ranks #40,183 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of oco vs on

Shared letters: o. Private to "oco": c. Private to "on": n.

"oco" · 3 letters · shape VCV · "on" · 2 letters · shape VC

Frequently Asked Questions

Is swapping "oco" for "on" ever safe?

No. They differ by 1 letter(s) in length, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.

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

"on" is the more common of the two: it sits at frequency rank #675 in our Portuguese list, against #27,951 for "oco". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

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

Full dictionary entry for "oco" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "on" - compare definitions side by side with the headword page. Word entry
This pair ranks #40,183 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"oco" and "on" also get mixed up with nearby pairs, the highest-scored neighbour is "oco vs oni". Nearby pair

Confusion rank #40,183 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.