# fal vs fo

> English confusable word pair

## The two words

### fal
*verb · frequency rank #43,151*
Obsolete spelling of fall.

### fo
*noun · frequency rank #12,049*
Abbreviation of folio, page and book size (10"-12.5" x 15"-20").

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