Which to use
“ill” is an adjective and “ils” is a pronoun - they look or sound alike but fill different roles in a sentence.
- #15,649
- “ill” frequency rank
- #54
- “ils” frequency rank
- 15703
- confusion score
Side-by-Side Comparison
| Feature | ill | ils |
|---|---|---|
| Definition | Malade, malsain. | Pronom clitique de la troisième personne du pluriel sujet, quand on parle d’un groupe d’hommes et de femmes ou de choses grammaticalement masculines et féminines. |
Where the spellings diverge
Shared letters are muted; the letters that actually set ill and ils apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
ill and ils form a confusable pair in the French index, two distinct headwords that are easily confused because they look alike, sound alike, or both. They differ by a single letter - l in “ill” becomes s in “ils” - close enough that the eye skips over the difference, far enough that meaning fully diverges. Our composite confusion score for this pair is 15703, derived from the frequency rank of both members and their visual similarity.
ill is recorded at frequency rank #15,649, classified as anadj, pronounced \ˈɪl\. ils is at rank #54, tagged as apron, pronounced \il\.
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 15703, this pair ranks #391,193 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Frequency comparison
Frequently Asked Questions
Can "ill" and "ils" be used interchangeably?
Remembering ill vs ils
The fastest way to pick the right one every time.
- Check the role first: if you need an adjective, it's “ill”; for a pronoun, it's “ils”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “ill” entry
- Browse more pairs most likely to be confused. Most confusable