irrationality
/ɪˌɹæʃ.əˈnæl.ə.ti/
"irrationality" is a 13-letter English headword indexed on PlainSpell.
The verdict
“irrationality” is uncommon English (frequency #50,011 among 2,140 “I” headwords), classed as a noun. The kind of spelling people second-guess.
- #50,011
- frequency rank, English
- 2,140
- “I” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The quality or state of being irrational.
Corpus desk
Index EN-irrationality · irrationality · English
irrationality · rank #50,011 · 0 variants · 0 confusables
- FREQ-RARE #50,011
- LEN-MEGA 13 letters
- VOW-7 7 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 2,140
- PHOTO-FINISH IRI
Nearest frequency peer: IRI (-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.
Long-tail ranks near “irrationality”
Sparse band: bars invert rank so rarer forms read shorter
- intravenous…
intravenously
49,993 corpus weight
- investigati…
investigational
49,992 corpus weight
- IRI
IRI
49,991 corpus weight
- irrationali…
irrationality
49,990 corpus weight
- Jamil
Jamil
49,989 corpus weight
- Janes
Janes
49,988 corpus weight
What this shows Long-tail view: where “irrationality” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | irrationality |
| Language | English |
| Part of speech | Noun |
| IPA | /ɪˌɹæʃ.əˈnæl.ə.ti/ |
| Letters | 13 |
| Frequency rank | #50,011 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “irrationality” in English
Rare enough to double-check
irrationality is uncommon English at frequency #50,011 among 2,140 “I” headwords, classed as anoun, transcribed /ɪˌɹæʃ.əˈnæl.ə.ti/. Rarity is why readers land here mid-draft. 4 senses are on record.
irrationality doesn't appear in our generated misspelling index, since its letter pattern doesn't lend itself to common typo substitutions. Our confusable-pair dataset has no match for it, since nothing in our dataset looks or sounds close enough to cause mix-ups.
Etymologically, the entry records: From irrational + -ity. May also be analyzed as ir- + rationality. The correct English form is irrationality, spelled I-R-R-A-T-I-O-N-A-L-I-T-Y.
Definition
- 1The quality or state of being irrational.
- 2The quality or state of being irrational.
- 3The quality or state of being irrational.
- 4Something that is irrational; the result of an illogical or absurd thought or action.
Recorded use
Wiktionary exampleThese source excerpts show how irrationality appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Man introduces reason into the world of Nature, destroying irrational struggle and waste. But this activity is outside of self, distant, only reflected. Man sees this irrationality only with his intellect.
Etymology
From irrational + -ity. May also be analyzed as ir- + rationality.
Antonyms
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 "irrationality", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 13 letters (nearest by frequency rank).