Insufficiency
Part of speech: noun
Definition: The lack of sufficiency; the shortage or inadequacy of.
Deficiency
Part of speech: noun
Definition: Inadequacy or incompleteness.An insufficiency, especially of something essential to health.
Example sentence: Taste is one of the five senses, and the man who tells us with priggish pride that he does not care what he eats is merely boasting of his sad deficiency: he might as well be proud of being deaf or blind, or, owing to a perpetual cold in the head, of being devoid of the sense of smell.