tree toad vs tree-frog

tree toad and tree-frog both are nouns.

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

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

tree toad and tree-frog: arboreal amphibians usually having adhesive disks at the tip of each toe; of southeast Asia and Australia and America

Other synonyms of tree toad include tree frog.

tree toad (noun)	tree-frog (noun)
arboreal amphibians usually having adhesive disks at the tip of each toe; of southeast Asia and Australia and America	any of various Old World arboreal frogs distinguished from true frogs by adhesive suckers on the toes
	arboreal amphibians usually having adhesive disks at the tip of each toe; of southeast Asia and Australia and America