insufficiency vs weakness

insufficiency and weakness both are nouns.

Word	Noun	Adjective	Verb	Adverb
insufficiency	Yes	No	No	No
weakness	Yes	No	No	No

As nouns, weakness is a hypernym of insufficiency; that is, weakness is a word with a broader meaning than insufficiency:

Other hypernyms of insufficiency include failing.

insufficiency (noun)	weakness (noun)
lack of an adequate quantity or number	the property of lacking physical or mental strength; liability to failure under pressure or stress or strain
(pathology) inability of a bodily part or organ to function normally	powerlessness revealed by an inability to act
a lack of competence	a penchant for something even though it might not be good for you
	a flaw or weak point
	the condition of being financially weak