Blue-sky and Wacky

Blue-sky adjective - Without immediate commercial value.

Wacky and blue-sky are semantically related. In some cases you can use "Wacky" instead an adjective phrase "Blue-sky".

Wacky adjective - Different from the ordinary in a way that causes curiosity or suspicion.

Blue-sky and wacky are semantically related. Sometimes you can use "Blue-sky" instead an adjective "Wacky".