abstention vs abstinence

abstention and abstinence both are nouns.

Word	Noun	Adjective	Verb	Adverb
abstention	Yes	No	No	No
abstinence	Yes	No	No	No

As nouns, abstention and abstinence are synonyms defined as:

abstention and abstinence: the trait of abstaining (especially from alcohol)

abstention (noun)	abstinence (noun)
the trait of abstaining (especially from alcohol)	act or practice of refraining from indulging an appetite
	the trait of abstaining (especially from alcohol)