coca vs plant product

coca and plant product both are nouns.

Word	Noun	Adjective	Verb	Adverb
coca	Yes	No	No	No
plant product	Yes	No	No	No

As nouns, plant product is a hypernym of coca; that is, plant product is a word with a broader meaning than coca:

coca: dried leaves of the coca plant (and related plants that also contain cocaine); chewed by Andean people for their stimulating effect
plant product: a product made from plant material

coca (noun)	plant product (noun)
dried leaves of the coca plant (and related plants that also contain cocaine); chewed by Andean people for their stimulating effect	a product made from plant material
a South American shrub whose leaves are chewed by natives of the Andes; a source of cocaine