# EI vs Erc

> English confusable word pair

## The two words

### EI
*noun · frequency rank #23,521*
Initialism of employment insurance.

### Erc
*name · frequency rank #43,630*
A member of the conspiracy that killed Cúchulainn, but was killed by his second cousin Conall the Victorious. Son of Cairbre Nia Fer and brother of Achall.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/ei-vs-erc