onovsottoWhich spelling fits?

Quick tell: ono is a pronoun, otto is a num, so they fill different roles in a sentence.

Which to use

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

#37,444
“ono” frequency rank
#11,925
“otto” frequency rank
49369
confusion score

Side-by-Side Comparison

Feature ono otto
Definition pronome pessoal neutro do caso nominativo da terceira pessoa do singular oito (8, VIII)

Letter map: ono vs otto

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

3 ch
ono
4 ch
otto

Part-of-speech tell for ono / otto

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: ono is apronoun and ottoanum. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 49369, derived from the frequency rank of both members and their visual similarity.

ono is recorded at frequency rank #37,444, classified as apron. otto is at rank #11,925, tagged as anum, pronounced /ˈɔtto/.

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 49369, this pair ranks #15,654 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of ono vs otto

Shared letters: o. Private to "ono": n. Private to "otto": t.

"ono" · 3 letters · shape VCV  ·  "otto" · 4 letters · shape VCCV

Known mistypes of this pair

  • ottooto · otot · toto

Frequently Asked Questions

Do "ono" and "otto" mean the same thing in a sentence?
No - they are not even the same part of speech. "ono" is a pronoun and "otto" a num, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "ono" vs "otto" - which ranks higher?
"otto" is the more common of the two: it sits at frequency rank #11,925 in our Portuguese list, against #37,444 for "ono". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

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

  • Full dictionary entry for "ono" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "otto" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #15,654 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "ono" and "otto" also get mixed up with nearby pairs, the highest-scored neighbour is "oni vs ono". 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 #15,654 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