congruence vs congruousness

congruence and congruousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
congruence	Yes	No	No	No
congruousness	Yes	No	No	No

As nouns, congruence and congruousness are synonyms defined as:

congruence and congruousness: the quality of agreeing; being suitable and appropriate

Other synonyms of congruence include congruity.

congruence (noun)	congruousness (noun)
the quality of agreeing; being suitable and appropriate	the quality of agreeing; being suitable and appropriate