nauvsnoiTell them apart

Quick tell: nau is a noun, noi is a pronoun, so they fill different roles in a sentence.

Which to use

“nau” is a noun and “noi” is a pronoun - they look or sound alike but fill different roles in a sentence.

#17,867
“nau” frequency rank
#36,563
“noi” frequency rank
54430
confusion score

Side-by-Side Comparison

Feature nau noi
Definition grande embarcação de guerra ou mercante, de tipo antigo nós

Letter map: nau vs noi

Shared letters muted; letters that set nau and noi apart highlighted. Shared run: 1. nau and noi follow the identical consonant-vowel pattern (CVV). Same shape at a glance is often the real trap, independent of shared letters.

3 ch
nau
3 ch
noi

Part-of-speech tell for nau / noi

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: nau is anoun and noiapronoun. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 54430, derived from the frequency rank of both members and their visual similarity.

nau is recorded at frequency rank #17,867, classified as anoun, pronounced /ˈnaw/. noi is at rank #36,563, 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 54430, this pair ranks #11,259 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of nau vs noi

Shared letters: n. Private to "nau": au. Private to "noi": io.

"nau" · 3 letters · shape CVV  ·  "noi" · 3 letters · shape CVV

Frequently Asked Questions

Can "nau" and "noi" be used interchangeably?
No - they are not even the same part of speech. "nau" is a noun and "noi" a pronoun, so a sentence built for one is usually ungrammatical with the other.
In ordinary Portuguese text, does "nau" or "noi" show up more?
"nau" is the more common of the two: it sits at frequency rank #17,867 in our Portuguese list, against #36,563 for "noi". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pair "nau" vs "noi" is on the table, pick a follow-up below.

  • Full dictionary entry for "nau" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "noi" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #11,259 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "nau" and "noi" also get mixed up with nearby pairs, the highest-scored neighbour is "noi vs noon". Nearby pair

Confusion rank #11,259 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