popularizer vs populariser

popularizer and populariser both are nouns.

Word	Noun	Adjective	Verb	Adverb
popularizer	Yes	No	No	No
populariser	Yes	No	No	No

As nouns, popularizer and populariser are synonyms defined as:

popularizer and populariser: someone who makes something attractive to the general public

Other synonyms of popularizer include vulgariser, vulgarizer.

popularizer (noun)	populariser (noun)
someone who makes something attractive to the general public	someone who makes something attractive to the general public