You can find synonyms using an online thesaurus (thesaurus.com / yourdictionary.com) or browsers such as Bing (type thesaurus intelligent).
The synonyms include adept, apt, astute, brainy, brilliant, bright, capable, canny, clever, quick, sharp, and smart.
smart, wise, knowledgeable, brilliant, well-informed
Smart, Intelectual
intelligent intellectual educated
Intelligent is an adjective. Some synonyms include smart, brainy, brilliant, and sharp.
Happy = Joyful Big = Large Smart = Intelligent Brave = Courageous
Synonyms for astute are, shrewd, smart, of good judgement, perceptive, wise, intelligent, sharp.
Brilliant Ingenious Intelligent Acute
intelligent, brilliant, brainy, skillful, smart, talented
Smart, intelligent.
beautiful-pretty smart-intelligent pick-get
Intelligent = capable, clever, efficient, skilled, talented. Mature = responsible, prepared, sophisticated.
intelligent, astute, witty, shrewd , sagcious, perspicacious