navsnuWhat's the difference?

Quick tell: na is a adverb, nu is a noun, so they fill different roles in a sentence.

Which to use

“na” is an adverb and “nu” is a noun - they look or sound alike but fill different roles in a sentence.

#3,512
“na” frequency rank
#13,967
“nu” frequency rank
17479
confusion score

Side-by-Side Comparison

Feature na nu
Definition Not. The letter of the Greek alphabet Ν (N) and ν (n).

Where the eye mixes na and nu

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

2 ch
na
2 ch
nu

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: na is /nɑː/ while nu is /njuː/. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - a in “na” becomes u in “nu”, and the parts of speech differ too (adverb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 17479, derived from the frequency rank of both members and their visual similarity.

na is recorded at frequency rank #3,512, classified as anadv, pronounced /nɑː/. nu is at rank #13,967, tagged as anoun, pronounced /njuː/.

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 17479, this pair ranks #451,164 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of na vs nu

Shared letters: n. Private to "na": a. Private to "nu": u.

"na" · 2 letters · shape CV  ·  "nu" · 2 letters · shape CV

Frequently Asked Questions

Can "na" and "nu" be used interchangeably?
No - they are not even the same part of speech. "na" is an adverb and "nu" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "na" or "nu"?
"na" is the more common of the two: it sits at frequency rank #3,512 in our English list, against #13,967 for "nu". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list