Which to use
“ko” is a noun and “kool” is a verb - they look or sound alike but fill different roles in a sentence.
- #10,717
- “ko” frequency rank
- #20,684
- “kool” frequency rank
- 31401
- confusion score
Side-by-Side Comparison
| Feature | ko | kool |
|---|---|---|
| Definition | A local shape to which the ko rule applies; a ko shape. | To look; to pay attention to with one’s eyes. |
Letter map: ko vs kool
Shared letters muted; letters that set ko and kool apart highlighted. Shared run: 2.
Grammar separator: ko vs kool
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: ko is anoun and koolaverb. On the page they differ by 2 extra letter(s) - “ko” sits inside “kool”. Our composite confusion score for this pair is 31401, derived from the frequency rank of both members and their visual similarity.
ko is recorded at frequency rank #10,717, classified as anoun, pronounced /ˈkəʊ/. kool is at rank #20,684, tagged as averb.
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 31401, this pair ranks #346,447 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of ko vs kool
Shared letters: ko. Private to "ko": -. Private to "kool": l.
"ko" · 2 letters · shape CV · "kool" · 4 letters · shape CVVC
Known mistypes of this pair
- kool ← kkool · kol · kolo · kooll · okol
Frequently Asked Questions
Is swapping "ko" for "kool" ever safe?
Frequency check: "ko" vs "kool" - which ranks higher?
What to do next
You've compared "ko" and "kool". Here's where to go from here.
- Full dictionary entry for "ko" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "kool" - compare definitions side by side with the headword page. Word entry
- This pair ranks #346,447 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "ko" and "kool" also get mixed up with nearby pairs, the highest-scored neighbour is "kool vs Kop". 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 #346,447 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.