illustrious
/ɪˈlʌs.tɹɪ.əs/
"illustrious" is a 11-letter English headword indexed on PlainSpell.
The verdict
“illustrious” is a moderately-common English word, ranked #19,364 in English word frequency and used as an adjective.
- #19,364
- frequency rank, English
- 11
- letters
- 14
- tracked misspellings
- 1
- confusable pair
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Admired, distinguished, respected, or well-known.
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 | illustrious |
| Language | English |
| Part of speech | Adjective |
| IPA | /ɪˈlʌs.tɹɪ.əs/ |
| Letters | 11 |
| Frequency rank | #19,364 |
| Misspellings tracked | 14 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Where “illustrious” sits in English frequency
Spelling & Dictionary Insight
The English entry for illustrious is 11 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /ɪˈlʌs.tɹɪ.əs/. Corpus data places it at rank #19,364 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "Admired, distinguished, respected, or well-known.".
Our generated misspelling index lists 14 likely wrong-spelling variants for illustrious, with forms such as "illsutrious", "illusrtious", and "illusstrious". 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, "industrious", since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: From Latin illūstris (“bright, shining; distinguished, prominent, illustrious”) + -ous (suffix forming adjectives from nouns, to denote possession or presence of a quality in any degree). Illūstris is derived from illūstrō (“to brighten, illuminate; to make… The correct English form is illustrious, spelled I-L-L-U-S-T-R-I-O-U-S.
Definition
- 1Admired, distinguished, respected, or well-known.
Etymology
From Latin illūstris (“bright, shining; distinguished, prominent, illustrious”) + -ous (suffix forming adjectives from nouns, to denote possession or presence of a quality in any degree). Illūstris is derived from illūstrō (“to brighten, illuminate; to make famous or illustrious”), from in- (“in, inside”) + lūstrō (“to purify by making a sacrifice; to brighten, illuminate”) (from lūstrō (“purificatory sacrifice”), possibly ultimately from Proto-Indo-European *lewk- (“bright; to shine”) or *lewh₃- (“to wash”)).
This word in other languages
Common misspellings
Also misspelled as: illsutrious,illusrtious,illusstrious,illustirous,illustriosu,illustriouss,illustriuos,illustroius,illustrrious,illusttrious,illutsrious,ilulstrious,ilustrious,lilustrious
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of illustrious - 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.
Frequently Asked Questions
How do you spell "illustrious"?
What does "illustrious" mean?
What words are commonly confused with "illustrious"?
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Using “illustrious”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-L-L-U-S-T-R-I-O-U-S - every other letter order is a misspelling in standard orthography.
- Say it as /ɪˈlʌs.tɹɪ.əs/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “industrious” - see the side-by-side comparison. illustrious vs industrious
- Browse more English words and confusable pairs in the same reference. English words
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.