equivalence vs nonequivalence

equivalence and nonequivalence both are nouns.

Word	Noun	Adjective	Verb	Adverb
equivalence	Yes	No	No	No
nonequivalence	Yes	No	No	No

equivalence (noun)	nonequivalence (noun)
qualities that are comparable	not interchangeable
essential equality and interchangeability
a state of being essentially equal or equivalent; equally balanced