midwife toad vs toad frog

midwife toad and toad frog both are nouns.

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

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

midwife toad: European toad whose male carries the fertilized eggs wrapped around its hind legs until they hatch
toad frog: any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species

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

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

midwife toad: similar in habit to Alytes obstetricians
toad frog: any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species

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

midwife toad (noun)	toad frog (noun)
European toad whose male carries the fertilized eggs wrapped around its hind legs until they hatch	any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species
similar in habit to Alytes obstetricians