chalaza vs plant part

chalaza and plant part both are nouns.

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

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

chalaza: basal part of a plant ovule opposite the micropyle; where integument and nucellus are joined
plant part: any part of a plant or fungus

Other hypernyms of chalaza include plant structure.

chalaza (noun)	plant part (noun)
one of two spiral bands of tissue connecting the egg yolk to the enclosing membrane at either end of the shell	any part of a plant or fungus
basal part of a plant ovule opposite the micropyle; where integument and nucellus are joined