bottomlessness vs profoundness

bottomlessness and profoundness both are nouns.

Word	Noun	Adjective	Verb	Adverb
bottomlessness	Yes	No	No	No
profoundness	Yes	No	No	No

As nouns, profoundness is a hypernym of bottomlessness; that is, profoundness is a word with a broader meaning than bottomlessness:

Other hypernyms of bottomlessness include deepness, profundity.

bottomlessness (noun)	profoundness (noun)
the property of being very deep; without limit	the quality of being physically deep
	intellectual depth, penetrating knowledge, keen insight, etc; "the depth of my feeling"; "the profoundness of the silence"
	the intellectual ability to penetrate deeply into ideas
	wisdom that is recondite and abstruse and profound
	extremeness of degree