degrader vs vulgariser

degrader and vulgariser both are nouns.

Word	Noun	Adjective	Verb	Adverb
degrader	Yes	No	No	No
vulgariser	Yes	No	No	No

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

degrader: a person who lowers the quality or character or value (as by adding cheaper metal to coins)
vulgariser: someone who makes something vulgar

Other hyponyms of degrader include vulgarizer.

degrader (noun)	vulgariser (noun)
a person who lowers the quality or character or value (as by adding cheaper metal to coins)	someone who makes something vulgar
	someone who makes something attractive to the general public