provitamin vs hydrocarbon

provitamin and hydrocarbon both are nouns.

Word	Noun	Adjective	Verb	Adverb
provitamin	Yes	No	No	No
hydrocarbon	Yes	No	No	No

As nouns, hydrocarbon is a hypernym of provitamin; that is, hydrocarbon is a word with a broader meaning than provitamin:

provitamin: vitamin precursor; a substance that is converted into a vitamin in animal tissues
hydrocarbon: an organic compound containing only carbon and hydrogen

provitamin (noun)	hydrocarbon (noun)
vitamin precursor; a substance that is converted into a vitamin in animal tissues	an organic compound containing only carbon and hydrogen