toad vs toad frog

toad and toad frog both are nouns.

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

As nouns, toad and toad frog are synonyms defined as:

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

Other synonyms of toad include anuran, batrachian, frog, salientian.

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