INTELLIGENT Synonyms: 205 Similar and Opposite Words - Merriam-Webster
https://www.merriam-webster.com/thesaurus/intelligent
WEBSynonyms for INTELLIGENT: smart, clever, quick, brilliant, fast, exceptional, bright, sharp; Antonyms of INTELLIGENT: unintelligent, dumb, stupid, dense, simple, slow, mindless, brainless.
DA: 24 PA: 97 MOZ Rank: 79