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 September 3, 2026) - Abbreviation of thirteenth; 13th.
Corpus desk
Index EN-xiiith · XIIIth · English
XIIIth · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-LONG 6 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "X" thin
- PHOTO-UNK Peer pending
Read with this headword: Spelling guide for this pattern
Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.
| Property | Value |
|---|---|
| Headword | XIIIth |
| Language | English |
| Part of speech | Adjective |
| Letters | 6 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “XIIIth” in English
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.
Recorded use
Wiktionary examplesThese source excerpts show how XIIIth appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
But at this early period, xii th or xiii th century, I have not yet seen the confusion in many words.
POLITICAL LETTERS AND SPEECHES / OF GEORGE, XIIIth / EARL OF PEMBROKE AND MONTGOMERY
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.