ranid vs grass frog

ranid and grass frog both are nouns.

Word	Noun	Adjective	Verb	Adverb
ranid	Yes	No	No	No
grass frog	Yes	No	No	No

As nouns, grass frog is a hyponym of ranid; that is, grass frog is a word with a more specific, narrower meaning than ranid:

ranid: insectivorous usually semiaquatic web-footed amphibian with smooth moist skin and long hind legs
grass frog: a common semiterrestrial European frog

ranid (noun)	grass frog (noun)
insectivorous usually semiaquatic web-footed amphibian with smooth moist skin and long hind legs	a common semiterrestrial European frog