XIIIth
"xiiith" is a 6-letter English headword indexed on PlainSpell.
The verdict
“XIIIth” is uncommon English (outside the top frequency list), classed as an adjective. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 6
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Abbreviation of thirteenth; 13th.
| Property | Value |
|---|---|
| Headword | XIIIth |
| Language | English |
| Part of speech | Adjective |
| Letters | 6 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “XIIIth” sits in English frequency
Rare enough to double-check
XIIIth is uncommon English outside the top frequency list, classed as anadjective. Rarity is why readers land here mid-draft. Gloss: "Abbreviation of thirteenth; 13th.".
XIIIth doesn't appear in our generated misspelling index, which points to an orthography that plays by predictable English rules. Our confusable-pair dataset has no match for it, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
Etymologically, the entry records: From XIII (Roman numeral representing thirteen) + -th (ordinal suffix). The correct English form is XIIIth, spelled X-I-I-I-T-H.
Definition
- 1Abbreviation of thirteenth; 13th.
Etymology
From XIII (Roman numeral representing thirteen) + -th (ordinal suffix).
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 “XIIIth”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is X-I-I-I-T-H - 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.