Tree-frog and Toad frog

Tree-frog noun - Any of various Old World arboreal frogs distinguished from true frogs by adhesive suckers on the toes.

Toad frog and tree-frog are semantically related. In some cases you can use "Toad frog" instead a noun phrase "Tree-frog".

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

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