Compounds of 聡

• 聡い
  (adj-i) smart
  sensitive
  discerning
• 聡敏
  (adj-na,n) sagacity
  cleverness
• 聡明
  (adj-na,n) wisdom
  sagacity
• 耳聡い
  (adj-i) sharp-eared
  have sharp ears
  picks things up fast
• 利に聡い
  (adj-i) wide-awake to one's interests