crazy bone vs elbow

crazy bone and elbow both are nouns.

Word	Noun	Adjective	Verb	Adverb
crazy bone	Yes	No	No	No
elbow	Yes	No	Yes	No

crazy bone (noun)	elbow (noun)
a point on the elbow where the ulnar nerve passes near the surface; a sharp tingling sensation results when the nerve is knocked against the bone	the joint of a mammal or bird that corresponds to the human elbow
	the part of a sleeve that covers the elbow joint
	a sharp bend in a road or river
	a length of pipe with a sharp bend in it
	hinge joint between the forearm and upper arm and the corresponding joint in the forelimb of a quadruped

crazy bone (verb)	elbow (verb)
	shove one's elbow into another person's ribs
	push one's way with the elbows