race vs shoot down

race is a noun but shoot down is not a noun.

Word	Noun	Adjective	Verb	Adverb
race	Yes	No	Yes	No
shoot down	No	No	Yes	No

As verbs, shoot down is a hyponym of race; that is, shoot down is a word with a more specific, narrower meaning than race:

Other hyponyms of race include barge, push forward, thrust ahead, buck, charge, shoot, tear, dart, dash, flash, scoot, scud, shoot.

race (noun)	shoot down (noun)
a canal for a current of water
a contest of speed
any competition
people who are believed to belong to the same genetic stock
(biology) a taxonomic group that is a division of a species; usually arises as a consequence of geographical isolation within a species
the flow of air that is driven backwards by an aircraft propeller

race (verb)	shoot down (verb)
compete in a race	shoot at and force to come down
move hurridly	move quickly and violently
cause to move fast or to rush or race	thwart the passage of
to work as fast as possible towards a goal, sometimes in competition with others