unguis vs complex body part

unguis and complex body part both are nouns.

Word	Noun	Adjective	Verb	Adverb
unguis	Yes	No	No	No
complex body part	Yes	No	No	No

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

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

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

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