Which to use
“idly” is an adverb and “ILS” is a noun - they look or sound alike but fill different roles in a sentence.
- #31,612
- “idly” frequency rank
- #39,360
- “ILS” frequency rank
- 70972
- confusion score
Side-by-Side Comparison
| Feature | idly | ILS |
|---|---|---|
| Definition | Without specific purpose, intent or effort. | Initialism of instrument landing system. |
Letter map: idly vs ILS
Shared letters muted; letters that set idly and ILS apart highlighted. Shared run: 2. idly runs 4 letters (VCCV) against ILS's 3 (VCC) - the length gap alone is often enough to separate them once you know to check it.
Role in the sentence - idly and ILS
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: idly is anadverb and ILSanoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 70972, derived from the frequency rank of both members and their visual similarity.
idly is recorded at frequency rank #31,612, classified as anadv, pronounced /ˈaɪd(ə)lɪ/. ILS is at rank #39,360, tagged as anoun.
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 70972, this pair ranks #48,511 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of idly vs ILS
Shared letters: il. Private to "idly": dy. Private to "ILS": s.
"idly" · 4 letters · shape VCCV · "ILS" · 3 letters · shape VCC
Known mistypes of this pair
- idly ← dily · iddly · idlly · idlyy · idyl · ildy
Frequently Asked Questions
Can "idly" and "ILS" be used interchangeably?
Frequency check: "idly" vs "ILS" - which ranks higher?
Useful next steps
Pair "idly" vs "ILS" is on the table, pick a follow-up below.
- Full dictionary entry for "idly" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ILS" - compare definitions side by side with the headword page. Word entry
- This pair ranks #48,511 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "idly" and "ILS" also get mixed up with nearby pairs, the highest-scored neighbour is "Ilan vs ILS". 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 #48,511 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.