# SPD vs STD

> English confusable word pair

## The two words

### SPD
*noun · frequency rank #20,781*
Initialism of schizoid personality disorder.

### STD
*noun · frequency rank #16,797*
Initialism of sexually transmitted disease.

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