congeniality vs compatibility

congeniality and compatibility both are nouns.

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

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

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

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