True frog and Toad frog

True frog noun - Insectivorous usually semiaquatic web-footed amphibian with smooth moist skin and long hind legs.

Toad frog and true frog are semantically related. In some cases you can use "Toad frog" instead a noun phrase "True frog".

Toad frog noun - Any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species.

True frog and toad frog are semantically related. Sometimes you can replace phrase "True frog" with "Toad frog", this phrases are similar.