baby's dummy vs comforter

baby's dummy and comforter both are nouns.

Word	Noun	Adjective	Verb	Adverb
baby's dummy	Yes	No	No	No
comforter	Yes	No	No	No

As nouns, baby's dummy and comforter are synonyms defined as:

baby's dummy and comforter: device used for an infant to suck or bite on

Other synonyms of baby's dummy include pacifier, teething ring.

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