reasonability
"reasonability" is a 13-letter English headword indexed on PlainSpell.
The verdict
“reasonability” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 13
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The state or quality of being reasonable.
Corpus desk
Index EN-reasonability · reasonability · English
reasonability · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-MEGA 13 letters
- VOW-7 7 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "R" thin
- PHOTO-UNK Peer pending
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.
| Property | Value |
|---|---|
| Headword | reasonability |
| Language | English |
| Part of speech | Noun |
| Letters | 13 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “reasonability” in English
Rare enough to double-check
reasonability is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "The state or quality of being reasonable.".
reasonability has no tracked misspelling variants, since its letter sequence doesn't invite the usual edit-distance slips. Our dataset records no confusable match here, suggesting its spelling stands apart enough that readers rarely confuse it with something else.
Etymologically, the entry records: From reason(able) + -ability. Compare Middle English unresonabiltee, unresonabylite, whence unreasonability. Piecewise doublet of rationability. The correct English form is reasonability, spelled R-E-A-S-O-N-A-B-I-L-I-T-Y.
Definition
- 1The state or quality of being reasonable.
Recorded use
Wiktionary examplesThese source excerpts show how reasonability appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
1897, Judson Harmon, "Brief for the United States in the Case of the United States of America v. The Trans-Missouri Freight Association," The Yale Law Journal, vol. 6, no. 6, p. 323n., The very difficult inquiry as to the reasonability of such agreements was an inadequate protection.
Epistemic reasonability could be understood in terms of the general requirement to try to have the largest possible set of logically independent beliefs that is such that the true beliefs outnumber the false beliefs.
Etymology
From reason(able) + -ability. Compare Middle English unresonabiltee, unresonabylite, whence unreasonability. Piecewise doublet of rationability.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.