velum vs plant part

velum and plant part both are nouns.

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

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

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

Other hypernyms of velum include plant structure.

velum (noun)	plant part (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