# alto vs ASTM

> English confusable word pair

## The two words

### alto
*noun · IPA /ˈæl.təʊ/ · frequency rank #15,565*
A musical part or section higher than tenor and lower than soprano, formerly the part that performed a countermelody above the tenor or main melody.

### ASTM
*name · frequency rank #31,068*
Initialism of American Society for Testing and Materials; former name of ASTM International.

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