thoroughness

/ˈθʌɹənəs/

//ˈθʌɹənəs// noun

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

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

The verdict

“thoroughness” is uncommon English (frequency #55,802 among 3,151 “T” headwords), classed as a noun. The kind of spelling people second-guess.

#55,802
frequency rank, English
3,151
“T” headwords

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

Corpus desk

Index EN-thoroughness · thoroughness · English

thoroughness · rank #55,802 · 0 variants · 0 confusables

  • FREQ-RARE #55,802
  • LEN-MEGA 12 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 3,151
  • PHOTO-FINISH TikTok

Nearest frequency peer: TikTok (+2 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 “thoroughness”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

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

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for thoroughness
PropertyValue
Headwordthoroughness
LanguageEnglish
Part of speechNoun
IPA/ˈθʌɹənəs/
Letters12
Frequency rank#55,802
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “thoroughness” in English

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).thoroughnessfalls in this rarity band:

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

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Rare peers in the same band: “TikTok” (#55,804), “terrifyingly” (#55,799), “telepathically” (#55,798). Among 3,151 “T” headwords, “thoroughness” is #55,802. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

thoroughness is uncommon English at frequency #55,802 among 3,151 “T” headwords, classed as anoun, transcribed /ˈθʌɹənəs/. Rarity is why readers land here mid-draft. 2 senses are on record.

Our edit-distance generator produced no likely misspellings for thoroughness, a sign its spelling follows regular English conventions. Our confusable-pair dataset has no match for it, since its spelling is unusual enough that it doesn't cluster with a lookalike.

Etymologically, the entry records: From thorough + -ness. The correct English form is thoroughness, spelled T-H-O-R-O-U-G-H-N-E-S-S.

Definition

  1. 1
    The state of being thorough.
  2. 2
    Attention to detail.

Recorded use

Wiktionary example

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

  1. Such jobs as weeding, for instance, could be done with a thoroughness impossible to human beings.

Etymology

From thorough + -ness.

This word in other languages

meticulosidad(Español)rigueur(Français)Gründlichkeit(Deutsch)rigor(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 "thoroughness"?
"thoroughness" is spelled T-H-O-R-O-U-G-H-N-E-S-S. The IPA pronunciation is /ˈθʌɹənəs/.
What does "thoroughness" mean?
As a noun, "thoroughness" means: The state of being thorough.
How do you pronounce "thoroughness"?
The IPA (International Phonetic Alphabet) transcription for "thoroughness" is /ˈθʌɹənəs/. 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 "thoroughness"?
From thorough + -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 "thoroughness", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 12 letters (nearest by frequency rank).

terrifyingly#55,799sportscaster#55,762psychometric#55,667preoperative#55,662

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

Source: FrequencyWords open word-frequency list