# ai vs AUC

> English confusable word pair

## The two words

### ai
*noun · IPA /ˈɑ.i/ · frequency rank #4,818*
A type of three-toed sloth, Bradypus tridactylus, endemic to forests of southern Venezuela, the Guianas, and northern Brazil.

### 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: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/ai-vs-auc