# coal vs cobalt

> English confusable word pair

## The two words

### coal
*noun · IPA /kəʊl/ · frequency rank #3,048*
A black or brownish black rock formed from prehistoric plant remains, composed largely of carbon and burned as a fuel.

### cobalt
*noun · IPA /ˈkəʊ.bɒlt/ · frequency rank #17,796*
A chemical element (symbol Co) with an atomic number of 27: a hard, lustrous, silver-gray metal.

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