cork vs bobber

cork and bobber both are nouns.

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

As nouns, cork and bobber are synonyms defined as:

cork and bobber: a small float usually made of cork; attached to a fishing line

Other synonyms of cork include bob, bobfloat.

cork (noun)	bobber (noun)
the plug in the mouth of a bottle (especially a wine bottle)	a small float usually made of cork; attached to a fishing line
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

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