key vs ki, What's the Difference?

Which to use

“key” and “ki” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#18,292
“key” frequency rank: #13,500
“ki” frequency rank: 31792
confusion score

Side-by-Side Comparison

Feature	key	ki
Definition	Llave.	Perro.

Same sound, different letters: key vs ki

Muted letters are shared; highlighted letters are the only spelling cue when pronunciation matches. Shared run: 1 letter.

3 ch

key

2 ch

Same sound, different spelling - key / ki

This is the hard kind. key and ki are pronounced identically ([kiː]) and both work as anoun. Neither the ear nor the grammar will rescue you; only the meaning does, so the glosses below are the whole decision. They differ by 1 letter(s) in length. Our composite confusion score for this pair is 31792, derived from the frequency rank of both members and their visual similarity.

key is recorded at frequency rank #18,292, classified as anoun, pronounced [kiː]. ki is at rank #13,500, tagged as anoun, pronounced /ˈkiː/.

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 31792, this pair ranks #205,291 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of key vs ki

Shared letters: k. Private to "key": ey. Private to "ki": i.

"key" · 3 letters · shape CVV · "ki" · 2 letters · shape CV

Frequently Asked Questions

Do "key" and "ki" mean the same thing in a sentence?

No. They are pronounced the same ([kiː]), which is exactly why they get swapped in writing, but the dictionary meanings above are different, and pronunciation is no guide here.

Which is more common, "key" or "ki"?

"ki" is the more common of the two: it sits at frequency rank #13,500 in our Spanish list, against #18,292 for "key". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

"key" and "ki" share a sound, keep the gloss open, then jump to the headword or a nearby trap.

Full dictionary entry for "key" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "ki" - compare definitions side by side with the headword page. Word entry
This pair ranks #205,291 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
"key" and "ki" also get mixed up with nearby pairs, the highest-scored neighbour is "keen vs key". Nearby pair

Confusion rank #205,291 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.