ovule vs reproductive structure

ovule and reproductive structure both are nouns.

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

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

ovule: a small body that contains the female germ cell of a plant; develops into a seed after fertilization
reproductive structure: the parts of a plant involved in its reproduction

ovule (noun)	reproductive structure (noun)
a small or immature ovum	the parts of a plant involved in its reproduction
a small body that contains the female germ cell of a plant; develops into a seed after fertilization