shin vs body part

shin and body part both are nouns.

Word	Noun	Adjective	Verb	Adverb
shin	Yes	No	Yes	No
body part	Yes	No	No	No

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

shin (noun)	body part (noun)
the inner and thicker of the two bones of the human leg between the knee and ankle	any part of an organism such as an organ or extremity
the front part of the human leg between the knee and the ankle
the 22nd letter of the Hebrew alphabet
a cut of meat from the lower part of the leg

shin (verb)	body part (verb)
climb awkwardly, as if by scrambling