# eighteenth

> English word · Adjective · IPA /ˌeɪˈtiːnθ/ · frequency rank #15,392

## Definitions
1. The ordinal form of the number eighteen.

## Etymology
Inherited from Middle English eightetenthe, eightetethe, from Old English eahtatēoþa, from Proto-Germanic *ahtudô tehundô. Equivalent to eighteen + -th (ordinal suffix).

## Easily confused with
- **eighteen** (https://plainspell.com/en/vs/eighteen-vs-eighteenth)

## Common misspellings (15)
`egihteenth`, `eigghteenth`, `eighetenth`, `eighhteenth`, `eighteenht`, `eighteennth`, `eighteenthh`, `eighteentth`, `eighteetnh`, `eighteneth`, `eightenth`, `eightteenth`, `eigtheenth`, `eihgteenth`, `ieghteenth`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/eighteenth