air mattress
"air-mattress" is a 11-letter English headword indexed on PlainSpell.
The verdict
“air mattress” 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
- 12
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A mattress that is inflated with air, and used as a temporary or permanent bed.
| Property | Value |
|---|---|
| Headword | air mattress |
| Language | English |
| Part of speech | Noun |
| Letters | 12 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “air mattress” sits in English frequency
Spelling & Dictionary Insight
The English entry for air mattress is 12 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. The dominant gloss from Wiktionary reads: "A mattress that is inflated with air, and used as a temporary or permanent bed.".
No generated misspelling entries exist for air mattress in our index, and the word's spelling is regular enough that our generator found nothing worth flagging. It is not paired with a close-neighbour confusable in our dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.
Etymologically, the entry records: From air + mattress. The correct English form is air mattress, spelled A-I-R- -M-A-T-T-R-E-S-S.
Definition
- 1A mattress that is inflated with air, and used as a temporary or permanent bed.
Etymology
From air + mattress.
Synonyms
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 “air mattress”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is A-I-R- -M-A-T-T-R-E-S-S - 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.