15th

adj

"15th" is a 2-letter English headword indexed on PlainSpell.

The verdict

“15th” is uncommon English (outside the top frequency list), classed as an adjective. The kind of spelling people second-guess.

Unranked
below top-frequency English
4
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Abbreviation of fifteenth.

Corpus desk

Index EN-15th · 15th · English

15th · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MID 4 letters
  • VOW-0 0 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "1" 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.

Key facts for 15th
PropertyValue
Headword15th
LanguageEnglish
Part of speechAdjective
Letters4
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “15th” in English

15thsits beyond the 100,000 most-frequent English words, in the long tail of technical, archaic, or otherwise rare vocabulary where spelling doubt tends to strike hardest.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

15th is uncommon English outside the top frequency list, classed as anadjective. Rarity is why readers land here mid-draft. Gloss: "Abbreviation of fifteenth.".

15th doesn't appear in our generated misspelling index, typically a sign the spelling maps closely to how the word sounds. It is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.

This entry's etymology isn't recorded, so spelling patterns must be inferred from the word's phoneme-to-grapheme mapping rather than from a documented borrowing chain. The correct English form is 15th, spelled 1-5-T-H.

Definition

  1. 1
    Abbreviation of fifteenth.

Recorded use

Wiktionary example

These source excerpts show how 15th appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Ms. Sheinbaum will legislate from buildings in downtown Mexico City near the Palace of the Inquisition, where crypto-Jews—a term used to describe Jews who were forced to convert to Christianity by the Spanish crown in the 15th century but continued to practice Judaism in secrecy—were tortured during the colonial period.

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

How do you spell "15th"?
"15th" is spelled 1-5-T-H.
What does "15th" mean?
As an adjective, "15th" means: Abbreviation of fifteenth.
What language does "15th" come from?
"15th" is a English word. You can look up definitions, pronunciations, and spelling data for this and other words across English, Spanish, Portuguese, French, and German on PlainSpell.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list