tree frog vs toad

tree frog and toad both are nouns.

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

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

tree frog: any of various Old World arboreal frogs distinguished from true frogs by adhesive suckers on the toes
toad: any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species

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

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

tree frog: arboreal amphibians usually having adhesive disks at the tip of each toe; of southeast Asia and Australia and America
toad: any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species

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

tree frog (noun)	toad (noun)
any of various Old World arboreal frogs distinguished from true frogs by adhesive suckers on the toes	any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species
arboreal amphibians usually having adhesive disks at the tip of each toe; of southeast Asia and Australia and America