pacifier vs baby's dummy

pacifier and baby's dummy both are nouns.

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

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

Other synonyms of pacifier include comforter, teething ring.

pacifier (noun)	baby's dummy (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