comforter vs bedding

comforter and bedding both are nouns.

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

As nouns, bedding is a hypernym of comforter; that is, bedding is a word with a broader meaning than comforter:

comforter: bedding made of two layers of cloth filled with stuffing and stitched together
bedding: coverings that are used on a bed

Other hypernyms of comforter include bed clothing, bedclothes.

comforter (noun)	bedding (noun)
bedding made of two layers of cloth filled with stuffing and stitched together	coverings that are used on a bed
device used for an infant to suck or bite on	material used to provide a bed for animals
a person who commiserates with someone who has had misfortune
a person who reduces the intensity (e.g., of fears) and calms and pacifies