ground snake vs colubrid snake

ground snake and colubrid snake both are nouns.

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

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

ground snake: small shy brightly-ringed terrestrial snake of arid or semiarid areas of western North America
colubrid snake: mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes

Other hypernyms of ground snake include colubrid.

ground snake (noun)	colubrid snake (noun)
small shy brightly-ringed terrestrial snake of arid or semiarid areas of western North America	mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes