running game vs end run

running game and end run both are nouns.

Word	Noun	Adjective	Verb	Adverb
running game	Yes	No	No	No
end run	Yes	No	No	No

As nouns, end run is a hyponym of running game; that is, end run is a word with a more specific, narrower meaning than running game:

running game: (American football) a play in which a player attempts to carry the ball through or past the opposing team
end run: (American football) an attempt to advance the ball by running around the end of the line

Other hyponyms of running game include draw, draw play, sweep, return, reverse, rush, rushing.

running game (noun)	end run (noun)
(American football) a play in which a player attempts to carry the ball through or past the opposing team	(American football) an attempt to advance the ball by running around the end of the line