# supplemental vs supplementary

> English confusable word pair

## The two words

### supplemental
*adjective · IPA /ˌsʌplɪˈmɛntəl/ · frequency rank #15,285*
Acting to supplement.

### supplementary
*adjective · frequency rank #18,199*
Additional; added to supply what is wanted.

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