XSS
"xss" is a 3-letter English headword indexed on PlainSpell.
The verdict
“XSS” is uncommon English (frequency #92,265 among 1,183 “X” headwords), classed as a noun. The kind of spelling people second-guess.
- #92,265
- frequency rank, English
- 1,183
- “X” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Abbreviation of cross-site scripting.
| Property | Value |
|---|---|
| Headword | XSS |
| Language | English |
| Part of speech | Noun |
| Letters | 3 |
| Frequency rank | #92,265 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “XSS” sits in English frequency
Rare enough to double-check
XSS is uncommon English at frequency #92,265 among 1,183 “X” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Abbreviation of cross-site scripting.".
XSS doesn't appear in our generated misspelling index, a sign its spelling follows regular English conventions. This entry stands alone in our confusable dataset, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
Etymologically, the entry records: The X denotes cross. CSS was avoided because of the potential for confusion with the existing Web technology named cascading style sheets. The correct English form is XSS, spelled X-S-S.
Definition
- 1Abbreviation of cross-site scripting.
Etymology
The X denotes cross. CSS was avoided because of the potential for confusion with the existing Web technology named cascading style sheets.
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 “XSS”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is X-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
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.