velum vs plant structure

velum and plant structure both are nouns.

Word	Noun	Adjective	Verb	Adverb
velum	Yes	No	No	No
plant structure	Yes	No	No	No

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

velum: a membranous covering attached to the immature fruiting body of certain mushrooms
plant structure: any part of a plant or fungus

Other hypernyms of velum include plant part.

velum (noun)	plant structure (noun)
a muscular flap that closes off the nasopharynx during swallowing or speaking	any part of a plant or fungus
a membranous covering attached to the immature fruiting body of certain mushrooms