cork vs phellem

cork and phellem both are nouns.

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

As nouns, cork and phellem are synonyms defined as:

cork and phellem: (botany) outer tissue of bark; a protective layer of dead cells

cork (noun)	phellem (noun)
the plug in the mouth of a bottle (especially a wine bottle)	(botany) outer tissue of bark; a protective layer of dead cells
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)	phellem (verb)
stuff with cork
close a bottle with a cork