bottle cork vs cork

bottle cork and cork both are nouns.

Word	Noun	Adjective	Verb	Adverb
bottle cork	Yes	No	No	No
cork	Yes	No	Yes	No

As nouns, bottle cork and cork are synonyms defined as:

bottle cork and cork: the plug in the mouth of a bottle (especially a wine bottle)

bottle cork (noun)	cork (noun)
the plug in the mouth of a bottle (especially a wine bottle)	the plug in the mouth of a bottle (especially a wine bottle)
	a small float usually made of cork; attached to a fishing line
	outer bark of the cork oak; used for stoppers for bottles etc.
	(botany) outer tissue of bark; a protective layer of dead cells

bottle cork (verb)	cork (verb)
	stuff with cork
	close a bottle with a cork