tailed toad vs toad frog

tailed toad and toad frog both are nouns.

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

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

tailed toad: western North American frog with a taillike copulatory organ
toad frog: any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species

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

tailed toad (noun)	toad frog (noun)
western North American frog with a taillike copulatory organ	any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species