firebox
"firebox" is a 7-letter English headword indexed on PlainSpell.
The verdict
“firebox” is uncommon English (frequency #61,465 among 18,613 “F” headwords), classed as a noun. The kind of spelling people second-guess.
- #61,465
- frequency rank, English
- 18,613
- “F” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The chamber of a steam engine, or a steam locomotive, in which the fuel is burned.
| Property | Value |
|---|---|
| Headword | firebox |
| Language | English |
| Part of speech | Noun |
| Letters | 7 |
| Frequency rank | #61,465 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “firebox” sits in English frequency
Rare enough to double-check
firebox is uncommon English at frequency #61,465 among 18,613 “F” headwords, classed as anoun. Rarity is why readers land here mid-draft. 3 senses are on record.
The misspelling generator found no plausible variants for firebox, suggesting the orthography follows predictable English patterns. This entry stands alone in our confusable dataset, a sign it's visually distinctive enough not to be mixed up with another word.
Etymologically, the entry records: From fire + box. In the sense of a redheaded woman, from box (“vagina”). The correct English form is firebox, spelled F-I-R-E-B-O-X.
Definition
- 1The chamber of a steam engine, or a steam locomotive, in which the fuel is burned.
- 2The part of a fireplace where the fuel is burned.
- 3A redheaded woman or her red pubic hair.
Etymology
From fire + box. In the sense of a redheaded woman, from box (“vagina”).
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 “firebox”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is F-I-R-E-B-O-X - every other letter order is a misspelling in standard orthography.
- Browse more English words and confusable pairs in the same reference. English words
Other uncommon English words near this 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.