rationalness

noun

"rationalness" is a 12-letter English headword indexed on PlainSpell.

The verdict

“rationalness” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
12
letters

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

Corpus desk

Index EN-rationalness · rationalness · English

rationalness · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 12 letters
  • VOW-5 5 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.

Key facts for rationalness
PropertyValue
Headwordrationalness
LanguageEnglish
Part of speechNoun
Letters12
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “rationalness” in English

rationalnessranks outside the top 100,000 English headwords, in the long tail of specialist, archaic, or seldom-used vocabulary, exactly the territory where a reader stops mid-sentence to double-check spelling.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

rationalness is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "The quality or state of being rational.".

Zero misspellings are on record for rationalness in our index, and the word's spelling is regular enough that our generator found nothing worth flagging. This entry stands alone in our confusable dataset, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From rational + -ness. The correct English form is rationalness, spelled R-A-T-I-O-N-A-L-N-E-S-S.

Definition

  1. 1
    The quality or state of being rational.

Recorded use

Wiktionary example

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

  1. And what difference is there between the credibleness and rationalness of any of these wonders and the credibleness and rationalness of Papal infallibility?

Etymology

From rational + -ness.

Synonyms

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.

Frequently Asked Questions

How do you spell "rationalness"?
"rationalness" is spelled R-A-T-I-O-N-A-L-N-E-S-S.
What does "rationalness" mean?
As a noun, "rationalness" means: The quality or state of being rational.
What is the origin of the word "rationalness"?
From rational + -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.

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

Source: FrequencyWords open word-frequency list