ILS
"ils" is a 3-letter English headword indexed on PlainSpell.
The verdict
“ILS” sits in 20 confusable pairs (corpus #39,360) as a noun. The look-alike neighbours are the real trap.
- #39,360
- frequency rank, English
- 2,140
- “I” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of instrument landing system.
Corpus desk
Index EN-ils · ILS · English
ILS · rank #39,360 · 0 variants · 20 confusables
- FREQ-MID #39,360
- LEN-MID 3 letters
- VOW-1 1 vowel
- CONFUS-HIGH 20 pairs
- VAR-0 0 variants
- BOOK-MID 2,140
- PHOTO-FINISH homey
Nearest frequency peer: homey (-2 rank slots)
Read with this headword: Spelling guide for this pattern
Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.
Frequency neighbours of confusable “ILS”
Peers at similar corpus weight, separate from look-alike pairs below
- Holyrood
Holyrood
60,645 corpus weight
- homeworld
homeworld
60,644 corpus weight
- homey
homey
60,643 corpus weight
- ILS
ILS
60,641 corpus weight
- impersonate
impersonate
60,639 corpus weight
- impropriety
impropriety
60,638 corpus weight
What this shows Bars place “ILS” against nearest ranked English headwords, not a reprint of the confusable-pair desk.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | ILS |
| Language | English |
| Part of speech | Noun |
| Letters | 3 |
| Frequency rank | #39,360 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Corpus rank beside confusables of “ILS”
Easy to mix with look-alikes
The spelling risk for ILS is neighbouring look-alikes ("in", "is", …), not just typos; it is anoun. Frequency #39,360 among 2,140 “I” headwords. 4 recorded senses keep meaning in play.
Our edit-distance generator produced no likely misspellings for ILS, suggesting the orthography follows predictable English patterns. It also participates in 20 confusable-pair relationships, "in", "is", "it", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.
Our source data has no etymology on file for this entry, so spelling patterns must be inferred from the word's phoneme-to-grapheme mapping rather than from a documented borrowing chain. The correct English form is ILS, spelled I-L-S.
Definition
- 1Initialism of instrument landing system.
- 2Initialism of integrated logistic support.
- 3Initialism of integrated library system.
- 4Initialism of imaginary lat syndrome /invisible lat syndrome.
Recorded use
Wiktionary examplesThese source excerpts show how ILS appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
A week has gone by and i^([sic]) still like a skinny guy wearing a Powerhouse gym sweatshirt suffering from acute ILS (Invisible Lat Syndrome....).
Neophytes, for example, risk being ridiculed by other gym members if they walk this way: ‘Aghh, look at him! He’s got ILS [Imaginary Lat Syndrome]’.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "ILS", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 3 letters (nearest by frequency rank).