tub stopper vs bath plug

tub stopper and bath plug both are nouns.

Word	Noun	Adjective	Verb	Adverb
tub stopper	Yes	No	No	No
bath plug	Yes	No	No	No

As nouns, tub stopper and bath plug are synonyms defined as:

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

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

tub stopper (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.