# SPF vs STA

> English confusable word pair

## The two words

### SPF
*noun · frequency rank #30,978*
Initialism of sun protection factor.

### STA
*name · frequency rank #19,212*
Initialism of State Transport Authority.

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