pacifier vs teething ring

pacifier and teething ring both are nouns.

Word	Noun	Adjective	Verb	Adverb
pacifier	Yes	No	No	No
teething ring	Yes	No	No	No

As nouns, pacifier and teething ring are synonyms defined as:

pacifier and teething ring: device used for an infant to suck or bite on

Other synonyms of pacifier include baby's dummy, comforter.

pacifier (noun)	teething ring (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