fruit vs reproductive structure

fruit and reproductive structure both are nouns.

Word	Noun	Adjective	Verb	Adverb
fruit	Yes	No	Yes	No
reproductive structure	Yes	No	No	No

As nouns, reproductive structure is a hypernym of fruit; that is, reproductive structure is a word with a broader meaning than fruit:

fruit (noun)	reproductive structure (noun)
an amount of a product	the parts of a plant involved in its reproduction
the consequence of some effort or action
the ripened reproductive body of a seed plant

fruit (verb)	reproductive structure (verb)
bear fruit
cause to bear fruit