leg bone vs shin bone

leg bone and shin bone both are nouns.

Word	Noun	Adjective	Verb	Adverb
leg bone	Yes	No	No	No
shin bone	Yes	No	No	No

As nouns, shin bone is a hyponym of leg bone; that is, shin bone is a word with a more specific, narrower meaning than leg bone:

leg bone: a bone of the leg
shin bone: the inner and thicker of the two bones of the human leg between the knee and ankle

Other hyponyms of leg bone include femoris, femur, thighbone, calf bone, fibula, shin, shinbone, tibia.

leg bone (noun)	shin bone (noun)
a bone of the leg	the inner and thicker of the two bones of the human leg between the knee and ankle
	a cut of meat from the lower part of the leg