on vs ono, What's the Difference?

Which to use

“on” is an adjective and “ono” is a pronoun - they look or sound alike but fill different roles in a sentence.

#675
“on” frequency rank: #37,444
“ono” frequency rank: 38119
confusion score

Side-by-Side Comparison

Feature	on	ono
Definition	ligado, ativo (na internet)	pronome pessoal neutro do caso nominativo da terceira pessoa do singular

Letter map: on vs ono

Shared letters muted; letters that set on and ono apart highlighted. Shared run: 2.

2 ch

3 ch

ono

Grammar separator: on vs ono

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: on is anadjective and onoapronoun. On the page they differ by 1 extra letter(s) - “on” sits inside “ono”. Our composite confusion score for this pair is 38119, derived from the frequency rank of both members and their visual similarity.

on is recorded at frequency rank #675, classified as anadj. ono is at rank #37,444, tagged as apron.

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 38119, this pair ranks #28,395 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of on vs ono

Shared letters: no. Private to "on": -. Private to "ono": -.

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

Frequently Asked Questions

Can "on" and "ono" be used interchangeably?

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

Which is more common, "on" or "ono"?

"on" is the more common of the two: it sits at frequency rank #675 in our Portuguese list, against #37,444 for "ono". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

You've compared "on" and "ono". Here's where to go from here.

Full dictionary entry for "on" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "ono" - compare definitions side by side with the headword page. Word entry
This pair ranks #28,395 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"on" and "ono" also get mixed up with nearby pairs, the highest-scored neighbour is "oni vs ono". Nearby pair

Confusion rank #28,395 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.