crapaud vs toad frog

crapaud and toad frog both are nouns.

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

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

crapaud: large toothed frog of South America and Central America resembling the bullfrog
toad frog: any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species

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

crapaud (noun)	toad frog (noun)
large toothed frog of South America and Central America resembling the bullfrog	any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species