As tough as old boots and Tough

Tough and as tough as old boots are semantically related In some cases you can use "Tough" instead an adjective phrase "As tough as old boots".

Tough adjective - Not easily chewed.

As tough as old boots and tough are semantically related in hard topic. You can use "As tough as old boots" instead an adjective "Tough". informal substitute

Nearby Words: toughness, toughen, toughening, tougher, toughed