Final answer:
Synonyms for insufficiency include deficiency, shortage, scarcity, paucity, dearth, and lack, all of which express the idea of an inadequate amount or supply of something.
Step-by-step explanation:
A synonym for insufficiency is a word that has a similar meaning and can be used interchangeably in some contexts. Synonyms for insufficiency include deficiency, shortage, scarcity, paucity, dearth, and lack. These words convey the idea of not having enough of something, whether it be resources, qualities, or quantities.