"Intelligent" means skilled at solving problems, making judgements, informed guesses, finding alternatives. "Intellectual" means someone with a preference for thinking (as opposed to action), reading, discussing, researching.
Clever Intelligent
intelligent; clever; intellectual.
intelligent sphere
intelligent intellectual educated
To be Intellectual is relating to the thought process, intelligent and knowledgable of a certain thing or subject.
Intelligent,genius,intellect,intellectual
intellectual
Intelligent Intellectual Intuitive
Intelligent, Intellectual, Wise,
brainy (informal), bright, smart, gifted, intellectual
Genius Intellectual Smart Academic brilliant brainy intelligent
dumb is slang for non-intellegent.