lockbox
"lockbox" is a 7-letter English headword indexed on PlainSpell.
The verdict
“lockbox” is uncommon English (frequency #76,068 among 16,425 “L” headwords), classed as a noun. The kind of spelling people second-guess.
- #76,068
- frequency rank, English
- 16,425
- “L” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A box with a built-in lock; usually, a portable one.
| Property | Value |
|---|---|
| Headword | lockbox |
| Language | English |
| Part of speech | Noun |
| Letters | 7 |
| Frequency rank | #76,068 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “lockbox” sits in English frequency
Rare enough to double-check
lockbox is uncommon English at frequency #76,068 among 16,425 “L” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "A box with a built-in lock; usually, a portable one.".
No misspelling variants are generated for lockbox in our index, since its letter pattern doesn't lend itself to common typo substitutions. This headword has no recorded confusable partner, which typically means the spelling is too distinctive to be mistaken for another word.
Etymologically, the entry records: From lock + box. The correct English form is lockbox, spelled L-O-C-K-B-O-X.
Definition
- 1A box with a built-in lock; usually, a portable one.
Etymology
From lock + box.
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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Using “lockbox”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is L-O-C-K-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.