# ninth

> English word · Adjective · IPA /naɪnθ/ · frequency rank #6,387

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

## Etymology
From Middle English nynthe, nynte, from Old English niġoþa, from Proto-Germanic *newundô; the -n- was reinserted by analogy with nine. Equivalent to nine + -th (ordinal suffix).

## Easily confused with
- **nit** (https://plainspell.com/en/vs/ninth-vs-nit)
- **nth** (https://plainspell.com/en/vs/ninth-vs-nth)
- **nite** (https://plainspell.com/en/vs/ninth-vs-nite)
- **NIST** (https://plainspell.com/en/vs/ninth-vs-nist)
- **north** (https://plainspell.com/en/vs/ninth-vs-north)
- **nitty** (https://plainspell.com/en/vs/ninth-vs-nitty)
- **NIH** (https://plainspell.com/en/vs/nih-vs-ninth)
- **nin** (https://plainspell.com/en/vs/nin-vs-ninth)
- **nine** (https://plainspell.com/en/vs/nine-vs-ninth)
- **Nina** (https://plainspell.com/en/vs/nina-vs-ninth)
- **nigh** (https://plainspell.com/en/vs/nigh-vs-ninth)
- **Nath** (https://plainspell.com/en/vs/nath-vs-ninth)
- **ninja** (https://plainspell.com/en/vs/ninja-vs-ninth)
- **nifty** (https://plainspell.com/en/vs/nifty-vs-ninth)
- **Nieto** (https://plainspell.com/en/vs/nieto-vs-ninth)
- **neath** (https://plainspell.com/en/vs/neath-vs-ninth)
- **nines** (https://plainspell.com/en/vs/nines-vs-ninth)
- **ninety** (https://plainspell.com/en/vs/ninety-vs-ninth)

## Common misspellings (8)
`innth`, `ninht`, `ninnth`, `ninthh`, `nintth`, `nitnh`, `nninth`, `nnith`

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