comforter vs sympathizer

comforter and sympathizer both are nouns.

Word	Noun	Adjective	Verb	Adverb
comforter	Yes	No	No	No
sympathizer	Yes	No	No	No

As nouns, comforter and sympathizer are synonyms defined as:

comforter and sympathizer: a person who commiserates with someone who has had misfortune

Other synonyms of comforter include sympathiser.

comforter (noun)	sympathizer (noun)
bedding made of two layers of cloth filled with stuffing and stitched together	someone who shares your feelings or opinions and hopes that you will be successful
device used for an infant to suck or bite on	a person who commiserates with someone who has had misfortune
a person who commiserates with someone who has had misfortune
a person who reduces the intensity (e.g., of fears) and calms and pacifies