FATT
"fatt" is a 4-letter English headword indexed on PlainSpell.
The verdict
“FATT” is uncommon English (frequency #84,237 among 2,507 “F” headwords), classed as a noun. The kind of spelling people second-guess.
- #84,237
- frequency rank, English
- 2,507
- “F” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of fracture appearance transition temperature.
Corpus desk
Index EN-fatt · FATT · English
FATT · rank #84,237 · 0 variants · 0 confusables
- FREQ-RARE #84,237
- LEN-MID 4 letters
- VOW-1 1 vowel
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 2,507
- PHOTO-FINISH faubourg
Nearest frequency peer: faubourg (+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.
Long-tail ranks near “FATT”
Sparse band: bars invert rank so rarer forms read shorter
- expropriate
expropriate
15,770 corpus weight
- extensibili…
extensibility
15,769 corpus weight
- extensional
extensional
15,768 corpus weight
- FATT
FATT
15,764 corpus weight
- faubourg
faubourg
15,763 corpus weight
- femtosecond
femtosecond
15,759 corpus weight
What this shows Long-tail view: where “FATT” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | FATT |
| Language | English |
| Part of speech | Noun |
| Letters | 4 |
| Frequency rank | #84,237 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “FATT” in English
Rare enough to double-check
FATT is uncommon English at frequency #84,237 among 2,507 “F” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Initialism of fracture appearance transition temperature.".
The misspelling generator found no plausible variants for FATT, a straightforward case of a spelling with little room for common typos. This entry stands alone in our confusable dataset, since nothing in our dataset looks or sounds close enough to cause mix-ups.
This entry carries no recorded etymology, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct English form is FATT, spelled F-A-T-T.
Definition
- 1Initialism of fracture appearance transition temperature.
Recorded use
Wiktionary exampleThese source excerpts show how FATT appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
However, after 5% strain, all the Charpy values for grade A were still above 27J at +20°C, as required by the LR Rules and the mean crystallinities were all below 50% indicating that the FATTs for all the plates remained below ambient temperature.
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.
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "FATT", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 4 letters (nearest by frequency rank).