Frog and Tree-frog

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

Tree-frog and frog are semantically related. In some cases you can replace phrase "Tree-frog" with "Frog", this terms are similar.

Nearby Words: froggy, frogling

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

Frog and tree-frog are semantically related. You can use "Frog" instead a noun phrase "Tree-frog".