ku vs kun, What's the Difference?

Which to use

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

#29,714
“ku” frequency rank: #17,465
“kun” frequency rank: 47179
confusion score

Side-by-Side Comparison

Feature	ku	kun
Definition	Ese, esa. Pronombre y adjetivo demostrativo usado para una entidad ausente.	Aceite de animal.

Where the eye mixes ku and kun

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

2 ch

3 ch

kun

Visual trap between ku and kun

These two trip readers on the page rather than in the ear: ku is [ˈku] while kun is [kun]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 extra letter(s) - “ku” sits inside “kun”, and the parts of speech differ too (pronoun vs noun), which is usually the fastest check. Our composite confusion score for this pair is 47179, derived from the frequency rank of both members and their visual similarity.

ku is recorded at frequency rank #29,714, classified as apron, pronounced [ˈku]. kun is at rank #17,465, tagged as anoun, pronounced [kun].

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 47179, this pair ranks #121,504 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of ku vs kun

Shared letters: ku. Private to "ku": -. Private to "kun": n.

"ku" · 2 letters · shape CV · "kun" · 3 letters · shape CVC

Frequently Asked Questions

Is swapping "ku" for "kun" ever safe?

No - they are not even the same part of speech. "ku" is a pronoun and "kun" a noun, so a sentence built for one is usually ungrammatical with the other.

In ordinary Spanish text, does "ku" or "kun" show up more?

"kun" is the more common of the two: it sits at frequency rank #17,465 in our Spanish list, against #29,714 for "ku". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

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

Full dictionary entry for "ku" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "kun" - compare definitions side by side with the headword page. Word entry
This pair ranks #121,504 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
"ku" and "kun" also get mixed up with nearby pairs, the highest-scored neighbour is "kar vs ku". Nearby pair

Confusion rank #121,504 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.