invalidation
/ɪnˌvæl.əˈdeɪ.ʃən/
"invalidation" is a 12-letter English headword indexed on PlainSpell.
The verdict
“invalidation” is uncommon English (frequency #72,429 among 17,902 “I” headwords), classed as a noun. The kind of spelling people second-guess.
- #72,429
- frequency rank, English
- 17,902
- “I” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The act of invalidating, or the state of being invalidated
| Property | Value |
|---|---|
| Headword | invalidation |
| Language | English |
| Part of speech | Noun |
| IPA | /ɪnˌvæl.əˈdeɪ.ʃən/ |
| Letters | 12 |
| Frequency rank | #72,429 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “invalidation” sits in English frequency
Rare enough to double-check
invalidation is uncommon English at frequency #72,429 among 17,902 “I” headwords, classed as anoun, transcribed /ɪnˌvæl.əˈdeɪ.ʃən/. Rarity is why readers land here mid-draft. Gloss: "The act of invalidating, or the state of being invalidated".
No misspelling variants are generated for invalidation in our index, a straightforward case of a spelling with little room for common typos. This headword has no recorded confusable partner, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: From invalidate + -ion or in- + validation. The correct English form is invalidation, spelled I-N-V-A-L-I-D-A-T-I-O-N.
Definition
- 1The act of invalidating, or the state of being invalidated
Etymology
From invalidate + -ion or in- + validation.
Synonyms
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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Using “invalidation”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-N-V-A-L-I-D-A-T-I-O-N - every other letter order is a misspelling in standard orthography.
- Say it as /ɪnˌvæl.əˈdeɪ.ʃən/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Browse more English words and confusable pairs in the same reference. English words
Other uncommon English words near this rank
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.