# o

> English word · Character · IPA /ˈəʊ/ · frequency rank #790

## Definitions
1. The fifteenth letter of the English alphabet, called o and written in the Latin script.
2. Alternative form of ο, the fifteenth letter of the Classical and Modern Greek alphabets, called omicron and (astronomy) used as an abbreviation of omicron in star names.

## Easily confused with
- **of** (https://plainspell.com/en/vs/o-vs-of)
- **on** (https://plainspell.com/en/vs/o-vs-on)
- **or** (https://plainspell.com/en/vs/o-vs-or)
- **OH** (https://plainspell.com/en/vs/o-vs-oh)
- **OK** (https://plainspell.com/en/vs/o-vs-ok)
- **op** (https://plainspell.com/en/vs/o-vs-op)
- **OS** (https://plainspell.com/en/vs/o-vs-os)
- **oz** (https://plainspell.com/en/vs/o-vs-oz)
- **OT** (https://plainspell.com/en/vs/o-vs-ot)
- **ou** (https://plainspell.com/en/vs/o-vs-ou)
- **OG** (https://plainspell.com/en/vs/o-vs-og)
- **oi** (https://plainspell.com/en/vs/o-vs-oi)
- **ow** (https://plainspell.com/en/vs/o-vs-ow)
- **OC** (https://plainspell.com/en/vs/o-vs-oc)
- **oo** (https://plainspell.com/en/vs/o-vs-oo)
- **om** (https://plainspell.com/en/vs/o-vs-om)
- **ox** (https://plainspell.com/en/vs/o-vs-ox)
- **ob** (https://plainspell.com/en/vs/o-vs-ob)
- **od** (https://plainspell.com/en/vs/o-vs-od)
- **OJ** (https://plainspell.com/en/vs/o-vs-oj)

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