reasonableness

/ˈɹiː.zə.nə.bəl.nəs/

//ˈɹiː.zə.nə.bəl.nəs// noun

By · According to Wiktionary data (CC BY-SA) ·

"reasonableness" is a 14-letter English headword indexed on PlainSpell.

The verdict

“reasonableness” is uncommon English (frequency #51,348 among 3,094 “R” headwords), classed as a noun. The kind of spelling people second-guess.

#51,348
frequency rank, English
3,094
“R” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The state or characteristic of being reasonable.

Corpus desk

Index EN-reasonableness · reasonableness · English

reasonableness · rank #51,348 · 0 variants · 0 confusables

  • FREQ-RARE #51,348
  • LEN-MEGA 14 letters
  • VOW-6 6 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 3,094
  • PHOTO-FINISH rearguard

Nearest frequency peer: rearguard (-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 “reasonableness”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “reasonableness” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for reasonableness
PropertyValue
Headwordreasonableness
LanguageEnglish
Part of speechNoun
IPA/ˈɹiː.zə.nə.bəl.nəs/
Letters14
Frequency rank#51,348
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “reasonableness” in English

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).reasonablenessfalls in this rarity band:

#1#100#1K#10K#100K
← used constantlyrarely used →

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Rare peers in the same band: “rearguard” (#51,347), “rebus” (#51,350), “rapt” (#51,345). Among 3,094 “R” headwords, “reasonableness” is #51,348. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

reasonableness is uncommon English at frequency #51,348 among 3,094 “R” headwords, classed as anoun, transcribed /ˈɹiː.zə.nə.bəl.nəs/. Rarity is why readers land here mid-draft. 2 senses are on record.

No generated misspelling entries exist for reasonableness in our index, typically a sign the spelling maps closely to how the word sounds. It is not paired with a close-neighbour confusable in our dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

Etymologically, the entry records: From Middle English resonabilnes, resonabilnesse, resonablenesse, equivalent to reasonable + -ness. The correct English form is reasonableness, spelled R-E-A-S-O-N-A-B-L-E-N-E-S-S.

Definition

  1. 1
    The state or characteristic of being reasonable.
  2. 2
    A reasonable action or behaviour.

Recorded use

Wiktionary example

These source excerpts show how reasonableness appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. This dictates the reasonableness of the rupture of a unipersonalist absolute that is pseudomonotheistic since, in this case, the possibility of any other being would have been made impossible.

Etymology

From Middle English resonabilnes, resonabilnesse, resonablenesse, equivalent to reasonable + -ness.

Synonyms

reasonability

This word in other languages

modération(Français)razoabilidade(Português)

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 "reasonableness"?
"reasonableness" is spelled R-E-A-S-O-N-A-B-L-E-N-E-S-S. The IPA pronunciation is /ˈɹiː.zə.nə.bəl.nəs/.
What does "reasonableness" mean?
As a noun, "reasonableness" means: The state or characteristic of being reasonable.
How do you pronounce "reasonableness"?
The IPA (International Phonetic Alphabet) transcription for "reasonableness" is /ˈɹiː.zə.nə.bəl.nəs/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "reasonableness"?
From Middle English resonabilnes, resonabilnesse, resonablenesse, equivalent to reasonable + -ness. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "reasonableness", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 14 letters (nearest by frequency rank).

multiplicative#51,268longitudinally#51,226interventional#51,183beautification#51,562

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list