nulavsnumWhat's the difference?

Quick tell: nula is a adjective, num is a particle, so they fill different roles in a sentence.

Which to use

“nula” is an adjective and “num” is a particle - they look or sound alike but fill different roles in a sentence.

#10,538
“nula” frequency rank
#27,707
“num” frequency rank
38245
confusion score

Side-by-Side Comparison

Feature nula num
Definition Forma del femenino singular de nulo. Acaso, no es el caso que, no... acaso.

Where the eye mixes nula and num

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
nula
3 ch
num

Look-alike desk: nula vs num

These two trip readers on the page rather than in the ear: nula is [ˈnula] while num is [nũː]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (adjective vs particle), which is usually the fastest check. Our composite confusion score for this pair is 38245, derived from the frequency rank of both members and their visual similarity.

nula is recorded at frequency rank #10,538, classified as anadj, pronounced [ˈnula]. num is at rank #27,707, tagged as aparticle, pronounced [nũː].

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 38245, this pair ranks #171,062 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of nula vs num

Shared letters: nu. Private to "nula": al. Private to "num": m.

"nula" · 4 letters · shape CVCV  ·  "num" · 3 letters · shape CVC

Known mistypes of this pair

  • nulanlua · nnula · nual · nulla · unla

Frequently Asked Questions

Is swapping "nula" for "num" ever safe?
No - they are not even the same part of speech. "nula" is an adjective and "num" a particle, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "nula" or "num" show up more?
"nula" is the more common of the two: it sits at frequency rank #10,538 in our Spanish list, against #27,707 for "num". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Eye-level mix-up between "nula" and "num" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "nula" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "num" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #171,062 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "nula" and "num" also get mixed up with nearby pairs, the highest-scored neighbour is "nox vs num". 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 #171,062 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list