abstainer vs puritan

abstainer and puritan both are nouns.

Word	Noun	Adjective	Verb	Adverb
abstainer	Yes	No	No	No
puritan	Yes	No	No	No

As nouns, puritan is a hyponym of abstainer; that is, puritan is a word with a more specific, narrower meaning than abstainer:

abstainer: someone who practices self denial as a spiritual discipline
puritan: someone who adheres to strict religious principles; someone opposed to sensual pleasures

Other hyponyms of abstainer include stylite.

abstainer (noun)	puritan (noun)
a person who refrains from drinking intoxicating beverages	someone who adheres to strict religious principles; someone opposed to sensual pleasures
someone who practices self denial as a spiritual discipline	a person excessively concerned about propriety and decorum