# ao vs AUC

> English confusable word pair

## The two words

### ao
*noun · frequency rank #17,538*
grue ("blue or green", considered one color)

### AUC
*adverb · frequency rank #48,600*
According to the Roman era, which reckons the number of years passed from the foundation of the city of Rome by Romulus, now usually taken as 753 bc.

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