instroke vs cam stroke

instroke and cam stroke both are nouns.

Word	Noun	Adjective	Verb	Adverb
instroke	Yes	No	No	No
cam stroke	Yes	No	No	No

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

instroke: the stroke of an engine piston moving away from the crankshaft
cam stroke: the maximum movement available to a pivoted or reciprocating piece by a cam

Other hypernyms of instroke include stroke, throw.

instroke (noun)	cam stroke (noun)
the stroke of an engine piston moving away from the crankshaft	the maximum movement available to a pivoted or reciprocating piece by a cam