fundus vs bodily structure

fundus and bodily structure both are nouns.

Word	Noun	Adjective	Verb	Adverb
fundus	Yes	No	No	No
bodily structure	Yes	No	No	No

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

fundus: (anatomy) the base of a hollow organ or that part of the organ farthest from its opening
bodily structure: a particular complex anatomical part of a living thing and its construction and arrangement

Other hypernyms of fundus include anatomical structure, body structure, complex body part, structure.

fundus (noun)	bodily structure (noun)
(anatomy) the base of a hollow organ or that part of the organ farthest from its opening	a particular complex anatomical part of a living thing and its construction and arrangement