artichoke heart vs artichoke

artichoke heart and artichoke both are nouns.

Word	Noun	Adjective	Verb	Adverb
artichoke heart	Yes	No	No	No
artichoke	Yes	No	No	No

artichoke heart (noun)	artichoke (noun)
the tender fleshy center of the immature artichoke flower	a thistlelike flower head with edible fleshy leaves and heart
	Mediterranean thistlelike plant widely cultivated for its large edible flower head