sinusitis
"sinusitis" is a 9-letter English headword indexed on PlainSpell.
The verdict
“sinusitis” is uncommon English (frequency #58,365 among 54,294 “S” headwords), classed as a noun. The kind of spelling people second-guess.
- #58,365
- frequency rank, English
- 54,294
- “S” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - An inflammation of one or more paranasal sinuses.
| Property | Value |
|---|---|
| Headword | sinusitis |
| Language | English |
| Part of speech | Noun |
| Letters | 9 |
| Frequency rank | #58,365 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “sinusitis” sits in English frequency
Rare enough to double-check
sinusitis is uncommon English at frequency #58,365 among 54,294 “S” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "An inflammation of one or more paranasal sinuses.".
No misspelling variants are generated for sinusitis in our index, suggesting the orthography follows predictable English patterns. Our dataset records no confusable match here, since its spelling is unusual enough that it doesn't cluster with a lookalike.
Etymologically, the entry records: From sinus + -itis. The correct English form is sinusitis, spelled S-I-N-U-S-I-T-I-S.
Definition
- 1An inflammation of one or more paranasal sinuses.
Etymology
From sinus + -itis.
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); 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 “sinusitis”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is S-I-N-U-S-I-T-I-S - 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.