tongueless frog vs batrachian

tongueless frog and batrachian both are nouns.

Word	Noun	Adjective	Verb	Adverb
tongueless frog	Yes	No	No	No
batrachian	Yes	Yes	No	No

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

tongueless frog: almost completely aquatic frog native to Africa and Panama and northern South America
batrachian: any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species

Other hypernyms of tongueless frog include anuran, frog, salientian, toad, toad frog.

tongueless frog (noun)	batrachian (noun)
almost completely aquatic frog native to Africa and Panama and northern South America	any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species

tongueless frog (adjective)	batrachian (adjective)
	relating to frogs and toads