superposable vs congruent

superposable and congruent both are adjectives.

Word	Noun	Adjective	Verb	Adverb
superposable	No	Yes	No	No
congruent	No	Yes	No	No

superposable (adjective)	congruent (adjective)
coinciding exactly when superimposed	coinciding when superimposed
	corresponding in character or kind