Smart as a whip and Sharp-sighted

Smart as a whip adjective - Having or marked by unusual and impressive intelligence.

Sharp-sighted and smart as a whip are semantically related. In some cases you can use "Sharp-sighted" instead an adjective phrase "Smart as a whip".

Sharp-sighted adjective - Having unusually keen vision.

Smart as a whip and sharp-sighted are semantically related. Sometimes you can use "Smart as a whip" instead an adjective phrase "Sharp-sighted".