Intelligent is a word used to describe someone who is smart, clever, and quick-witted. Synonyms for intelligent include bright, savvy, sharp, ingenious, knowledgeable, intellectual, astute, and perceptive. The word bright refers to someone who is quick to understand things, while savvy applies to someone who understands practical issues. Sharp refers to someone with a keen mind and perception, while ingenious indicates a person with exceptional creativity. Intellectual applies to someone who is well-read and thoughtful, while astute refers to someone with a shrewd and insightful mind. Finally, perceptive applies to someone who is attuned to and capable of understanding subtle nuances and details.