congenialness vs compatibility

congenialness and compatibility both are nouns.

Word	Noun	Adjective	Verb	Adverb
congenialness	Yes	No	No	No
compatibility	Yes	No	No	No

As nouns, compatibility is a hypernym of congenialness; that is, compatibility is a word with a broader meaning than congenialness:

congenialness: compatibility between persons
compatibility: capability of existing or performing in harmonious or congenial combination

congenialness (noun)	compatibility (noun)
compatibility between persons	capability of existing or performing in harmonious or congenial combination
	a feeling of sympathetic understanding