# plenum vs plexus

> English confusable word pair

## The two words

### plenum
*noun · IPA /ˈpliːnəm/ · frequency rank #38,104*
A space that is completely filled with matter.

### plexus
*noun · IPA /ˈplɛk.səs/ · frequency rank #37,628*
A network of anastomosing or interwoven nerves, blood vessels, or lymphatic vessels.

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