Fermat
/ˈfɜːmæt/
"fermat" is a 6-letter English headword indexed on PlainSpell.
The verdict
“Fermat” is uncommon English (frequency #82,290 among 18,613 “F” headwords), classed as a proper noun. The kind of spelling people second-guess.
- #82,290
- frequency rank, English
- 18,613
- “F” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A French surname.
Corpus desk
Index EN-fermat · Fermat · English
Fermat · rank #82,290 · 0 variants · 0 confusables
- FREQ-RARE #82,290
- LEN-LONG 6 letters
- VOW-2 2 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 18,613
- PHOTO-FINISH Fenerbahce
Nearest frequency peer: Fenerbahce (-1 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.
Frequency neighbourhood for “Fermat”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- Feldstein
Feldstein
17,714 corpus weight
- Feltham
Feltham
17,713 corpus weight
- Fenerbahce
Fenerbahce
17,712 corpus weight
- Fermat
Fermat
17,711 corpus weight
- filibusteri…
filibustering
17,707 corpus weight
- finasteride
finasteride
17,706 corpus weight
What this shows Bars show where “Fermat” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
| Property | Value |
|---|---|
| Headword | Fermat |
| Language | English |
| Part of speech | Proper noun |
| IPA | /ˈfɜːmæt/ |
| Letters | 6 |
| Frequency rank | #82,290 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “Fermat” sits in English frequency
Rare enough to double-check
Fermat is uncommon English at frequency #82,290 among 18,613 “F” headwords, classed as aproper noun, transcribed /ˈfɜːmæt/. Rarity is why readers land here mid-draft. Gloss: "A French surname.".
No generated misspelling entries exist for Fermat in our index, a straightforward case of a spelling with little room for common typos. It is not paired with a close-neighbour confusable in our dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.
No documented word history exists for this headword, so spelling patterns must be inferred from the word's phoneme-to-grapheme mapping rather than from a documented borrowing chain. The correct English form is Fermat, spelled F-E-R-M-A-T.
Definition
- 1A French surname.
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.
PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 6, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "Fermat", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 6 letters (nearest by frequency rank).
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.