chiasm vs anatomical structure

chiasm and anatomical structure both are nouns.

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

As nouns, anatomical structure is a hypernym of chiasm; that is, anatomical 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
anatomical structure: a particular complex anatomical part of a living thing and its construction and arrangement

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

chiasm (noun)	anatomical 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