immorality vs depravity

immorality and depravity both are nouns.

Word	Noun	Adjective	Verb	Adverb
immorality	Yes	No	No	No
depravity	Yes	No	No	No

As nouns, depravity is a hyponym of immorality; that is, depravity is a word with a more specific, narrower meaning than immorality:

immorality: the quality of not being in accord with standards of right or good conduct
depravity: moral perversion; impairment of virtue and moral principles

immorality (noun)	depravity (noun)
morally objectionable behavior	a corrupt or depraved or degenerate act or practice
the quality of not being in accord with standards of right or good conduct	moral perversion; impairment of virtue and moral principles