robber frog vs toad frog

robber frog and toad frog both are nouns.

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

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

robber frog: small terrestrial frog of tropical America
toad frog: any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species

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

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

robber frog: of southwest United States and Mexico; call is like a dog's bark
toad frog: any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species

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

robber frog (noun)	toad frog (noun)
small terrestrial frog of tropical America	any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species
of southwest United States and Mexico; call is like a dog's bark