nn vs Not, What's the Difference?

Which to use

“nn” is an adverb and “Not” is a noun - they look or sound alike but fill different roles in a sentence.

#37,935
“nn” frequency rank: #3,924
“Not” frequency rank: 41859
confusion score

Side-by-Side Comparison

Feature	nn	Not
Definition	não	necessidade

Letter map: nn vs Not

Shared letters muted; letters that set nn and Not apart highlighted. Shared run: 1.

2 ch

3 ch

Not

Part-of-speech tell for nn / Not

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: nn is anadverb and Notanoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 41859, derived from the frequency rank of both members and their visual similarity.

nn is recorded at frequency rank #37,935, classified as anadv. Not is at rank #3,924, tagged as anoun, pronounced /noːt/.

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 41859, this pair ranks #24,008 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of nn vs Not

Shared letters: n. Private to "nn": -. Private to "Not": ot.

"nn" · 2 letters · shape CC · "Not" · 3 letters · shape CVC

Frequently Asked Questions

Is swapping "nn" for "Not" ever safe?

No - they are not even the same part of speech. "nn" is an adverb and "Not" a noun, so a sentence built for one is usually ungrammatical with the other.

Frequency check: "nn" vs "Not" - which ranks higher?

"Not" is the more common of the two: it sits at frequency rank #3,924 in our Portuguese list, against #37,935 for "nn". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Done with this confusable. These links stay specific to "nn" and "Not".

Full dictionary entry for "nn" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "Not" - compare definitions side by side with the headword page. Word entry
This pair ranks #24,008 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"nn" and "Not" also get mixed up with nearby pairs, the highest-scored neighbour is "nn vs noon". Nearby pair

Confusion rank #24,008 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.