key vs kyu, What's the Difference?

Which to use

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

#788
“key” frequency rank: #35,806
“kyu” frequency rank: 36594
confusion score

Side-by-Side Comparison

Feature	key	kyu
Definition	An object designed to open and close a lock.	A grade or rank in various Japanese activities such as martial arts, flower arranging, and the game of go.

Letter map: key vs kyu

Shared letters muted; letters that set key and kyu apart highlighted. Shared run: 2.

3 ch

key

3 ch

kyu

Spelling & dictionary notes on key vs kyu

key and kyu are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 36594, derived from the frequency rank of both members and their visual similarity.

key is recorded at frequency rank #788, classified as anoun, pronounced /kiː/. kyu is at rank #35,806, tagged as anoun.

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 36594, this pair ranks #301,832 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of key vs kyu

Shared letters: ky. Private to "key": e. Private to "kyu": u.

"key" · 3 letters · shape CVV · "kyu" · 3 letters · shape CVV

Frequently Asked Questions

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

No. They share most of their letters but differ in 2 positions, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.

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

"key" is the more common of the two: it sits at frequency rank #788 in our English list, against #35,806 for "kyu". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Done with this confusable. These links stay specific to "key" and "kyu".

Full dictionary entry for "key" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "kyu" - compare definitions side by side with the headword page. Word entry
This pair ranks #301,832 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"key" and "kyu" also get mixed up with nearby pairs, the highest-scored neighbour is "Kop vs kyu". Nearby pair

Confusion rank #301,832 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.