teething ring vs pacifier

teething ring and pacifier both are nouns.

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

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

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

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

teething ring (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