baby's dummy vs pacifier

baby's dummy and pacifier both are nouns.

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

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

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

baby's dummy (noun)	pacifier (noun)
device used for an infant to suck or bite on	device used for an infant to suck or bite on
	anything that serves to pacify
	someone who tries to bring peace