unauthorised
"unauthorised" is a 12-letter English headword indexed on PlainSpell.
The verdict
“unauthorised” is a moderately-common English word, ranked #28,775 in English word frequency and used as an adjective.
- #28,775
- frequency rank, English
- 12
- letters
- 17
- tracked misspellings
- 1
- confusable pair
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Alternative spelling of unauthorized.
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 | unauthorised |
| Language | English |
| Part of speech | Adjective |
| Letters | 12 |
| Frequency rank | #28,775 |
| Misspellings tracked | 17 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Where “unauthorised” sits in English frequency
Spelling & Dictionary Insight
The English entry for unauthorised is 12 letters long, classified as an adjective. Corpus data places it at rank #28,775 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "Alternative spelling of unauthorized.".
Our generated misspelling index lists 17 likely wrong-spelling variants for unauthorised, with forms such as "nuauthorised", "uanuthorised", and "unatuhorised". 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, "unauthorized", where similar look or sound leads writers to substitute one word for another in context.
Etymologically, the entry records: From un- + authorised. The correct English form is unauthorised, spelled U-N-A-U-T-H-O-R-I-S-E-D.
Definition
- 1Alternative spelling of unauthorized.
Etymology
From un- + authorised.
Common misspellings
Also misspelled as: nuauthorised,uanuthorised,unatuhorised,unauhtorised,unauthhorised,unauthoirsed,unauthoriesd,unauthorisde,unauthorisedd,unauthorissed,unauthorrised,unauthorsied,unauthroised,unautohrised,unautthorised,unnauthorised,unuathorised
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of unauthorised - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.
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 "unauthorised"?
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Using “unauthorised”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is U-N-A-U-T-H-O-R-I-S-E-D - every other letter order is a misspelling in standard orthography.
- Don't mix it up with “unauthorized” - see the side-by-side comparison. unauthorised vs unauthorized
- 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.