distributor cam vs cam

distributor cam and cam both are nouns.

Word	Noun	Adjective	Verb	Adverb
distributor cam	Yes	No	No	No
cam	Yes	No	No	No

As nouns, cam is a hypernym of distributor cam; that is, cam is a word with a broader meaning than distributor cam:

distributor cam: the cam inside the distributor that rotates to contact spark plug terminals in the correct order
cam: a rotating disk shaped to convert circular into linear motion

distributor cam (noun)	cam (noun)
the cam inside the distributor that rotates to contact spark plug terminals in the correct order	a rotating disk shaped to convert circular into linear motion