sink plug vs bath plug

sink plug and bath plug both are nouns.

Word	Noun	Adjective	Verb	Adverb
sink plug	Yes	No	No	No
bath plug	Yes	No	No	No

As nouns, sink plug and bath plug are synonyms defined as:

sink plug and bath plug: A plug intended for washbasins, bath tubs and other similar water containers.

Other synonyms of sink plug include basin plug, tub stopper.

sink plug (noun)	bath plug (noun)
A plug intended for washbasins, bath tubs and other similar water containers.	A plug intended for washbasins, bath tubs and other similar water containers.