alphabetizer vs alphabetiser

alphabetizer and alphabetiser both are nouns.

Word	Noun	Adjective	Verb	Adverb
alphabetizer	Yes	No	No	No
alphabetiser	Yes	No	No	No

As nouns, alphabetizer and alphabetiser are synonyms defined as:

alphabetizer and alphabetiser: a literate person who can arrange items in alphabetical order

alphabetizer (noun)	alphabetiser (noun)
a literate person who can arrange items in alphabetical order	a literate person who can arrange items in alphabetical order