back door
"back-door" is a 8-letter English headword indexed on PlainSpell.
The verdict
“back door” is outside the top-ranked English vocabulary, used as a noun - the kind of word writers most often double-check.
- Unranked
- below top-frequency English
- 9
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A subsidiary entrance to a building or house at its rear, normally away from the street.
| Property | Value |
|---|---|
| Headword | back door |
| Language | English |
| Part of speech | Noun |
| Letters | 9 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “back door” sits in English frequency
Spelling & Dictionary Insight
The English entry for back door is 9 letters long, classified as a noun. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. Wiktionary records 6 distinct senses for this headword, so context determines which meaning a reader should apply.
Zero misspellings are on record for back door in our index, suggesting the orthography follows predictable English patterns. Our dataset records no confusable match here, which typically means the spelling is too distinctive to be mistaken for another word.
This headword's origin isn't recorded in our source data, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct English form is back door, spelled B-A-C-K- -D-O-O-R.
Definition
- 1A subsidiary entrance to a building or house at its rear, normally away from the street.
- 2A means of access, often secret and unprotected, to something.
- 3A secret means of access to a program or system.
- 4A rear side door of a car, or at the back of a van.
- 5The anus; (by extension) anal sex.
- 6The rear side of the hole, furthest from the golfer.
Antonyms
This word in other languages
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.
Frequently Asked Questions
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Using “back door”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is B-A-C-K- -D-O-O-R - every other letter order is a misspelling in standard orthography.
- Browse more English words and confusable pairs in the same reference. English words
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.