whip-snake vs colubrid snake

whip-snake and colubrid snake both are nouns.

Word	Noun	Adjective	Verb	Adverb
whip-snake	Yes	No	No	No
colubrid snake	Yes	No	No	No

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

whip-snake: any of several small fast-moving snakes with long whiplike tails
colubrid snake: mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes

Other hypernyms of whip-snake include colubrid.

whip-snake (noun)	colubrid snake (noun)
any of several small fast-moving snakes with long whiplike tails	mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes