Imbecilic and Wacky

Imbecilic adjective - Having a mental age of three to seven years.

Wacky and imbecilic are semantically related in ability topic. In some cases you can use "Wacky" instead an adjective "Imbecilic", when it comes to topics like foolish, impractical.

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

Imbecilic and wacky are semantically related in ability topic. Sometimes you can use "Imbecilic" instead an adjective "Wacky", if it concerns topics such as impractical.