Which to use
“II” is a noun and “ill” is an adjective - they look or sound alike but fill different roles in a sentence.
- #1,020
- “II” frequency rank
- #1,946
- “ill” frequency rank
- 2966
- confusion score
Side-by-Side Comparison
| Feature | II | ill |
|---|---|---|
| Definition | Initialism of illegal immigrant. | Evil; wicked (of people). |
Letter map: II vs ill
Shared letters muted; letters that set II and ill apart highlighted. Shared run: 1.
Role in the sentence - II and ill
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: II is anoun and illanadjective. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 2966, derived from the frequency rank of both members and their visual similarity.
II is recorded at frequency rank #1,020, classified as anoun. ill is at rank #1,946, tagged as anadj, pronounced /ɪl/.
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 2966, this pair ranks #523,513 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of II vs ill
Shared letters: i. Private to "II": -. Private to "ill": l.
"II" · 2 letters · shape VV · "ill" · 3 letters · shape VCC
Frequently Asked Questions
Is swapping "II" for "ill" ever safe?
Frequency check: "II" vs "ill" - which ranks higher?
Useful next steps
Done with this confusable. These links stay specific to "II" and "ill".
- Full dictionary entry for "II" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ill" - compare definitions side by side with the headword page. Word entry
- This pair ranks #523,513 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "II" and "ill" also get mixed up with nearby pairs, the highest-scored neighbour is "Ilan vs ill". Nearby pair
Confusion rank #523,513 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.