# spare vs spiro

> English confusable word pair

## The two words

### spare
*adjective · IPA /spɛə(ɹ)/ · frequency rank #4,490*
Extra.

### spiro
*noun · IPA /ˈspɪɹəʊ/ · frequency rank #40,900*
A polycyclic compound or system that contains a single atom as the only common member of two rings.

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