Kasey vs key, What's the Difference?

Which to use

“Kasey” is a name and “key” is a noun - they look or sound alike but fill different roles in a sentence.

#44,291
“Kasey” frequency rank: #788
“key” frequency rank: 45079
confusion score

Side-by-Side Comparison

Feature	Kasey	key
Definition	A male given name.	An object designed to open and close a lock.

Where the spellings diverge

Shared letters are muted; the letters that actually set Kasey and key apart are highlighted. They share 3 letters in sequence, which is exactly why the eye skips the difference.

5 ch

Kasey

3 ch

key

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: Kasey is /ˈkeɪsi/ while key is /kiː/. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (name vs noun), which is usually the fastest check. Our composite confusion score for this pair is 45079, derived from the frequency rank of both members and their visual similarity.

Kasey is recorded at frequency rank #44,291, classified as aname, pronounced /ˈkeɪsi/. key is at rank #788, tagged as anoun, pronounced /kiː/.

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 45079, this pair ranks #224,616 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of Kasey vs key

Shared letters: eky. Private to "Kasey": as. Private to "key": -.

"Kasey" · 5 letters · shape CVCVV · "key" · 3 letters · shape CVV

Known mistypes of this pair

Kasey ← aksey · kaesy · kaseyy · kassey · kasye · kkasey · ksaey

Frequency comparison

Kasey#44,291

key#788

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "Kasey" and "key" be used interchangeably?

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

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

"key" is the more common of the two: it sits at frequency rank #788 in our English list, against #44,291 for "Kasey". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Remembering Kasey vs key

The fastest way to pick the right one every time.

Check the role first: if you need a name, it's “Kasey”; for a noun, it's “key”.
See each word in full, definition, IPA, etymology and its other confusables. Full “Kasey” entry
Browse more pairs most likely to be confused. Most confusable