unguis vs body structure

unguis and body structure both are nouns.

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

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

unguis: any rigid body structure composed primarily of keratin
body structure: a particular complex anatomical part of a living thing and its construction and arrangement

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

unguis (noun)	body structure (noun)
any rigid body structure composed primarily of keratin	a particular complex anatomical part of a living thing and its construction and arrangement