# complex vs coupler

> English confusable word pair

## The two words

### complex
*adjective · IPA /ˈkɒmplɛks/ · frequency rank #1,449*
Made up of multiple parts; composite; not simple.

### coupler
*noun · IPA /ˈkʌp(ə)lə/ · frequency rank #43,583*
Someone who couples things together, especially someone whose job it is to couple railway carriages.

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