chiasm vs body structure

chiasm and body structure both are nouns.

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

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

chiasm: an intersection or crossing of two tracts in the form of the letter X
body structure: a particular complex anatomical part of a living thing and its construction and arrangement

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

chiasm (noun)	body structure (noun)
an intersection or crossing of two tracts in the form of the letter X	a particular complex anatomical part of a living thing and its construction and arrangement