# pronto vs proton

> English confusable word pair

## The two words

### pronto
*adverb · IPA /ˈpɹɒntəʊ/ · frequency rank #34,649*
Quickly, very soon, promptly.

### proton
*noun · IPA /ˈpɹəʊ.tɒn/ · frequency rank #16,779*
A positively charged subatomic particle forming part of the nucleus of an atom and determining the atomic number of an element, composed of two up quarks and a down quark.

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