king snake vs colubrid

king snake and colubrid both are nouns.

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

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

king snake: any of numerous nonvenomous North American constrictors; feed on other snakes and small mammals
colubrid: mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes

Other hypernyms of king snake include colubrid snake.

king snake (noun)	colubrid (noun)
any of numerous nonvenomous North American constrictors; feed on other snakes and small mammals	mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes