FFF
"fff" is a 3-letter English headword indexed on PlainSpell.
The verdict
“FFF” is uncommon English (frequency #53,539 among 2,507 “F” headwords), classed as a noun. The kind of spelling people second-guess.
- #53,539
- frequency rank, English
- 2,507
- “F” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of fused filament fabrication.
Corpus desk
Index EN-fff · FFF · English
FFF · rank #53,539 · 0 variants · 0 confusables
- FREQ-RARE #53,539
- LEN-MID 3 letters
- VOW-0 0 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 2,507
- PHOTO-FINISH fellatio
Nearest frequency peer: fellatio (-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 “FFF”
Sparse band: bars invert rank so rarer forms read shorter
- feathery
feathery
46,466 corpus weight
- feelgood
feelgood
46,464 corpus weight
- fellatio
fellatio
46,463 corpus weight
- FFF
FFF
46,462 corpus weight
- FIFO
FIFO
46,460 corpus weight
- Fitzwilliam
Fitzwilliam
46,457 corpus weight
What this shows Long-tail view: where “FFF” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | FFF |
| Language | English |
| Part of speech | Noun |
| Letters | 3 |
| Frequency rank | #53,539 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “FFF” in English
Rare enough to double-check
FFF is uncommon English at frequency #53,539 among 2,507 “F” headwords, classed as anoun. Rarity is why readers land here mid-draft. 3 senses are on record.
Zero misspellings are on record for FFF in our index, which points to an orthography that plays by predictable English rules. Our confusable-pair dataset has no match for it, suggesting its spelling stands apart enough that readers rarely confuse it with something else.
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 FFF, spelled F-F-F.
Definition
- 1Initialism of fused filament fabrication.
- 2Initialism of furlong–firkin–fortnight (“a humorous system of units based on unusual or impractical measurements”).
- 3Initialism of fine French furniture
Recorded use
Wiktionary examplesThese source excerpts show how FFF appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
While there are many polymers available as filaments for fused filament fabrication (FFF) extrusion-style 3D printing, PLA, PETG, TPU and ABS are among the most common. Here is a quick-reference table to some of the properties of these materials: […]
In the nineteen-fifties, the height of aspirational style was fine French furniture—F.F.F., as it became known in certain precincts of Fifth Avenue and Palm Beach.
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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Similar English words by spelling shape
Same letter count and similar misspelling depth for "FFF", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 3 letters (nearest by frequency rank).