germ vs body structure

germ and body structure both are nouns.

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

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

germ: a small apparently simple structure (as a fertilized egg) from which new tissue can develop into a complete organism
body structure: a particular complex anatomical part of a living thing and its construction and arrangement

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

germ (noun)	body structure (noun)
a minute life form (especially a disease-causing bacterium); the term is not in technical use	a particular complex anatomical part of a living thing and its construction and arrangement
a small apparently simple structure (as a fertilized egg) from which new tissue can develop into a complete organism
anything that provides inspiration for later work