# ides vs index

> English confusable word pair

## The two words

### ides
*noun · IPA /aɪdz/ · frequency rank #44,856*
The notional full-moon day of a Roman month, occurring on the 15th day of the four original 31-day months (March, May, Quintilis or July, and October) and on the 13th day of all other months.

### index
*noun · IPA /ˈɪndɛks/ · frequency rank #2,628*
An alphabetical listing of items and their location.

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