outstroke vs cam stroke

outstroke and cam stroke both are nouns.

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

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

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

Other hypernyms of outstroke include stroke, throw.

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