barking frog vs robber frog

barking frog and robber frog both are nouns.

Word	Noun	Adjective	Verb	Adverb
barking frog	Yes	No	No	No
robber frog	Yes	No	No	No

As nouns, barking frog and robber frog are synonyms defined as:

barking frog and robber frog: of southwest United States and Mexico; call is like a dog's bark

Other synonyms of barking frog include Hylactophryne augusti.

barking frog (noun)	robber frog (noun)
of southwest United States and Mexico; call is like a dog's bark	small terrestrial frog of tropical America
	of southwest United States and Mexico; call is like a dog's bark