abstinence vs abstention

abstinence and abstention both are nouns.

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

As nouns, abstinence and abstention are synonyms defined as:

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

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