robber frog vs barking frog

robber frog and barking frog both are nouns.

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

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

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

Other synonyms of robber frog include Hylactophryne augusti.

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