unflammable
"unflammable" is a 11-letter English headword indexed on PlainSpell.
The verdict
“unflammable” is uncommon English (outside the top frequency list), classed as an adjective. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 11
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Not flammable.
Corpus desk
Index EN-unflammable · unflammable · English
unflammable · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-MEGA 11 letters
- VOW-4 4 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "U" thin
- PHOTO-UNK Peer pending
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.
| Property | Value |
|---|---|
| Headword | unflammable |
| Language | English |
| Part of speech | Adjective |
| Letters | 11 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “unflammable” in English
Rare enough to double-check
unflammable is uncommon English outside the top frequency list, classed as anadjective. Rarity is why readers land here mid-draft. Gloss: "Not flammable.".
Zero misspellings are on record for unflammable in our index, a sign its spelling follows regular English conventions. No confusable counterpart is on file for this word, since nothing in our dataset looks or sounds close enough to cause mix-ups.
Etymologically, the entry records: From un- + flammable. The correct English form is unflammable, spelled U-N-F-L-A-M-M-A-B-L-E.
Definition
- 1Not flammable.
Recorded use
Wiktionary examplesThese source excerpts show how unflammable appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Refrigerators used for flammables should be unflammable material storage units or explosion-free.
Many of the silane-based penetrants are alcohol- or solvent-based and flammable. The nature of AAS used in this study is unflammable and unvolatile, which allowed for construction safety;
Etymology
From un- + flammable.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.