grass snake vs colubrid

grass snake and colubrid both are nouns.

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

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

grass snake: any of numerous nonvenomous longitudinally-striped viviparous North American and Central American snakes
colubrid: mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes

Other hypernyms of grass snake include colubrid snake.

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

grass snake: either of two North American chiefly insectivorous snakes that are green in color
colubrid: mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes

Other hypernyms of grass snake include colubrid snake.

grass snake (noun)	colubrid (noun)
harmless European snake with a bright yellow collar; common in England	mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes
any of numerous nonvenomous longitudinally-striped viviparous North American and Central American snakes
either of two North American chiefly insectivorous snakes that are green in color