Which to use
“Casey” and “Cathy” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #7,534
- “Casey” frequency rank
- #14,084
- “Cathy” frequency rank
- 21618
- confusion score
Side-by-Side Comparison
| Feature | Casey | Cathy |
|---|---|---|
| Definition | A surname from Irish. | A diminutive of the female given name Catherine and of its variant forms, also used as a formal given name in the 20th century. |
Where the eye mixes Casey and Cathy
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Why the eye confuses Casey with Cathy
A purely visual mix-up. Casey (/ˈkeɪsi/) and Cathy (/ˈkæθi/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 21618, derived from the frequency rank of both members and their visual similarity.
Casey is recorded at frequency rank #7,534, classified as aname, pronounced /ˈkeɪsi/. Cathy is at rank #14,084, tagged as aname, pronounced /ˈkæθi/.
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 21618, this pair ranks #422,592 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of Casey vs Cathy
Shared letters: acy. Private to "Casey": es. Private to "Cathy": ht.
"Casey" · 5 letters · shape CVCVV · "Cathy" · 5 letters · shape CVCCV
Known mistypes of this pair
Frequently Asked Questions
Can "Casey" and "Cathy" be used interchangeably?
In ordinary English text, does "Casey" or "Cathy" show up more?
What to do next
Eye-level mix-up between "Casey" and "Cathy" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "Casey" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "Cathy" - compare definitions side by side with the headword page. Word entry
- This pair ranks #422,592 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "Casey" and "Cathy" also get mixed up with nearby pairs, the highest-scored neighbour is "Cathy vs catty". 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 #422,592 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.