profundity vs deepness

profundity and deepness both are nouns.

Word	Noun	Adjective	Verb	Adverb
profundity	Yes	No	No	No
deepness	Yes	No	No	No

As nouns, profundity and deepness are synonyms defined as:

Other synonyms of profundity include profoundness.

As nouns, deepness is a hypernym of profundity; that is, deepness is a word with a broader meaning than profundity:

Other hypernyms of profundity include depth.

As nouns, profundity and deepness are synonyms defined as:

profundity and deepness: the intellectual ability to penetrate deeply into ideas

Other synonyms of profundity include astuteness, depth, profoundness.

profundity (noun)	deepness (noun)
the quality of being physically deep	the quality of being physically deep
intellectual depth, penetrating knowledge, keen insight, etc; "the depth of my feeling"; "the profoundness of the silence"	the extent downward or backward or inward
the intellectual ability to penetrate deeply into ideas	a low pitch that is loud and voluminous
wisdom that is recondite and abstruse and profound	the intellectual ability to penetrate deeply into ideas