# SI vs SK

> English confusable word pair

## The two words

### SI
*name · frequency rank #5,453*
International System of Units

### SK
*phrase · frequency rank #14,837*
Initialism of stop keying/stop key, indicating a desire to end the conversation.

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