illnesses
/ˈɪl.nəsɪz/
"illnesses" is a 9-letter English headword indexed on PlainSpell.
The verdict
“illnesses” has 10 generated spelling variants in the English index at frequency #11,723. The variants make it a useful spelling check.
- #11,723
- frequency rank, English
- 17,902
- “I” headwords
- 10
- tracked misspellings
- 1
- confusable pair
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - plural of illness
Corpus desk
Index EN-illnesses · illnesses · English
illnesses · rank #11,723 · 10 variants · 1 confusable
- FREQ-MID #11,723
- LEN-LONG 9 letters
- VOW-3 3 vowels
- CONFUS-LOW 1 pairs
- VAR-MID 10 variants
- BOOK-DENSE 17,902
- PHOTO-FINISH honourable
Nearest frequency peer: honourable (-1 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 neighbourhood for “illnesses”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- highlighting
highlighting
88,281 corpus weight
- holt
holt
88,280 corpus weight
- honourable
honourable
88,279 corpus weight
- illnesses
illnesses
88,278 corpus weight
- imminent
imminent
88,277 corpus weight
- inaugural
inaugural
88,276 corpus weight
What this shows Bars show where “illnesses” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
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 | illnesses |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈɪl.nəsɪz/ |
| Letters | 9 |
| Frequency rank | #11,723 |
| Misspellings tracked | 10 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Where “illnesses” sits in English frequency
A misspelling magnet
The generator records 10 spelling variants around illnesses (IPA /ˈɪl.nəsɪz/), anoun. Corpus frequency is #11,723 among 17,902 “I” headwords. Dominant gloss: "plural of illness".
Our generated misspelling index lists 10 likely wrong-spelling variants for illnesses, with forms such as "illensses", "illneses", and "illnesess". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 1 confusable-pair relationship, "illness", 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 its spelling is best explained by sound-to-letter mapping rather than etymology. The correct English form is illnesses, spelled I-L-L-N-E-S-S-E-S.
Definition
- 1plural of illness
Common misspellings
Also misspelled as:
- illensses
- illneses
- illnesess
- illnessess
- illnessse
- illnnesses
- illnseses
- ilnesses
- ilnlesses
- lilnesses
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of illnesses - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.
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.
PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 6, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.
Frequently Asked Questions
How do you spell "illnesses"?
What does "illnesses" mean?
What words are commonly confused with "illnesses"?
How do you pronounce "illnesses"?
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "illnesses", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 9 letters (nearest by frequency rank).
Similar misspelling depth
Headwords with a similar count of attested misspellings (10 here; floor ≥5).
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.