# i vs ISR

> English confusable word pair

## The two words

### i
*character · IPA /aɪ/ · frequency rank #7*
The ninth letter of the English alphabet, called i and written in the Latin script.

### ISR
*noun · frequency rank #49,434*
Initialism of interrupt service routine.

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