tirelessness

noun

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

The verdict

“tirelessness” 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 property of being tireless.

Corpus desk

Index EN-tirelessness · tirelessness · English

tirelessness · 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 "T" 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 tirelessness
PropertyValue
Headwordtirelessness
LanguageEnglish
Part of speechNoun
Letters12
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “tirelessness” in English

tirelessnesssits beyond the 100,000 most-frequent English words, in the long tail of technical, archaic, or otherwise rare vocabulary where spelling doubt tends to strike hardest.

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

Rare enough to double-check

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

No misspelling variants are generated for tirelessness in our index, since its letter pattern doesn't lend itself to common typo substitutions. No confusable counterpart is on file for this word, which tends to mean the word is visually distinctive enough to stand on its own.

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

Definition

  1. 1
    The property of being tireless.

Recorded use

Wiktionary example

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

  1. His tirelessness in helping the poor won him an award and a nervous breakdown from exhaustion.

Etymology

From tireless + -ness.

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 "tirelessness"?
"tirelessness" is spelled T-I-R-E-L-E-S-S-N-E-S-S.
What does "tirelessness" mean?
As a noun, "tirelessness" means: The property of being tireless.
What is the origin of the word "tirelessness"?
From tireless + -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