aster vs body structure

aster and body structure both are nouns.

Word	Noun	Adjective	Verb	Adverb
aster	Yes	No	No	No
body structure	Yes	No	No	No

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

aster: star-shaped structure formed in the cytoplasm of a cell having fibers like rays that surround the centrosome during mitosis
body structure: a particular complex anatomical part of a living thing and its construction and arrangement

Other hypernyms of aster include anatomical structure, bodily structure, complex body part, structure.

aster (noun)	body structure (noun)
star-shaped structure formed in the cytoplasm of a cell having fibers like rays that surround the centrosome during mitosis	a particular complex anatomical part of a living thing and its construction and arrangement
any of various chiefly fall-blooming herbs of the genus Aster with showy daisylike flowers