steeplechaser vs racer

steeplechaser and racer both are nouns.

Word	Noun	Adjective	Verb	Adverb
steeplechaser	Yes	No	No	No
racer	Yes	No	No	No

As nouns, racer is a hypernym of steeplechaser; that is, racer is a word with a broader meaning than steeplechaser:

Other hypernyms of steeplechaser include Equus caballus, horse.

steeplechaser (noun)	racer (noun)
a horse trained to run in steeplechases	an animal that races
	slender fast-moving North American snakes
	a fast car that competes in races
	someone who drives racing cars at high speeds