sheep frog vs toad frog

sheep frog and toad frog both are nouns.

Word	Noun	Adjective	Verb	Adverb
sheep frog	Yes	No	No	No
toad frog	Yes	No	No	No

As nouns, toad frog is a hypernym of sheep frog; that is, toad frog is a word with a broader meaning than sheep frog:

sheep frog: mostly of Central America
toad frog: any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species

Other hypernyms of sheep frog include anuran, batrachian, frog, salientian, toad.

sheep frog (noun)	toad frog (noun)
mostly of Central America	any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species