racer vs colubrid snake

racer and colubrid snake both are nouns.

Word	Noun	Adjective	Verb	Adverb
racer	Yes	No	No	No
colubrid snake	Yes	No	No	No

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

racer: slender fast-moving North American snakes
colubrid snake: mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes

Other hypernyms of racer include colubrid.

racer (noun)	colubrid snake (noun)
an animal that races	mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes
slender fast-moving North American snakes
a fast car that competes in races
someone who drives racing cars at high speeds