# inefficiency vs inefficient

> English confusable word pair

## The two words

### inefficiency
*noun · frequency rank #33,282*
Lack of efficiency or effectiveness.

### inefficient
*adjective · IPA /ˌɪn.ɪˈfɪʃ.ənt/ · frequency rank #15,838*
Not efficient; not producing the effect intended or desired; inefficacious.

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