# insufficiency vs insufficiently

> English confusable word pair

## The two words

### insufficiency
*noun · IPA /ɪnsəˈfɪʃənsi/ · frequency rank #42,207*
The lack of sufficiency: a shortage, the state of having or being not enough (of something).

### insufficiently
*adverb · frequency rank #38,910*
Not sufficiently.

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