sink plug vs basin plug

sink plug and basin plug both are nouns.

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

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

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

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

sink plug (noun)	basin 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.