fitness
/ˈfɪt.nəs/
"fitness" is a 7-letter English headword indexed on PlainSpell.
The verdict
“fitness” is a regularly-used English word, ranked #3,692 in English word frequency and used as a noun.
- #3,692
- frequency rank, English
- 7
- letters
- 9
- tracked misspellings
- 6
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The condition of being fit, suitable or appropriate.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | fitness |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈfɪt.nəs/ |
| Letters | 7 |
| Frequency rank | #3,692 |
| Misspellings tracked | 9 |
| Confusable pairs | 6 |
| Source | Wiktionary (kaikki.org) |
Where “fitness” sits in English frequency
Spelling & Dictionary Insight
The English entry for fitness is 7 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈfɪt.nəs/. Corpus data places it at rank #3,692 in overall English word frequency, indicating it appears regularly in written and spoken text. Wiktionary records 4 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 9 likely wrong-spelling variants for fitness, with forms such as "ffitness", "fintess", and "fitenss". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It also participates in 6 confusable-pair relationships, "Furness", "fines", "finest", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: From fit + -ness. First attested in the 16th century, with the physical sense from 1935. The correct English form is fitness, spelled F-I-T-N-E-S-S.
Definition
- 1The condition of being fit, suitable or appropriate.
- 2The cultivation of an attractive and/or healthy physique.
- 3An organism's or species' degree of success in finding a mate and producing offspring.
- 4The condition of being attractive, fanciable or beautiful.
Etymology
From fit + -ness. First attested in the 16th century, with the physical sense from 1935.
This word in other languages
Common misspellings
Also misspelled as: ffitness,fintess,fitenss,fitnes,fitnness,fitnses,fittness,ftiness,iftness
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of fitness - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.
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
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Using “fitness”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is F-I-T-N-E-S-S - every other letter order is a misspelling in standard orthography.
- Say it as /ˈfɪt.nəs/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “Furness” - see the side-by-side comparison. fitness vs Furness
- Browse more English words and confusable pairs in the same reference. English words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.