fleetingness

noun

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

The verdict

“fleetingness” 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 of being fleeting.

Corpus desk

Index EN-fleetingness · fleetingness · English

fleetingness · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 12 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "F" 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 fleetingness
PropertyValue
Headwordfleetingness
LanguageEnglish
Part of speechNoun
Letters12
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “fleetingness” in English

fleetingnessfalls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

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

Rare enough to double-check

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

No misspelling variants are generated for fleetingness in our index, and the word's spelling is regular enough that our generator found nothing worth flagging. It is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From fleeting + -ness. The correct English form is fleetingness, spelled F-L-E-E-T-I-N-G-N-E-S-S.

Definition

  1. 1
    The quality of being fleeting.

Recorded use

Wiktionary example

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

  1. But the perpetual mutability and fleetingness of those immediate objects of sight render them incapable of being managed after the manner of geometrical figures […]

Etymology

From fleeting + -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 "fleetingness"?
"fleetingness" is spelled F-L-E-E-T-I-N-G-N-E-S-S.
What does "fleetingness" mean?
As a noun, "fleetingness" means: The quality of being fleeting.
What is the origin of the word "fleetingness"?
From fleeting + -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