Compounds of 勁

• 発勁
  (n) (MA) release internal power
• 雄勁
  (adj-na,n) vigorous
  powerful
• 勁捷
  (n) strong and nimble
• 勁卒
  (n) excellent soldier
• 勁敵
  (n) formidable foe
• 勁悍
  (n) strong and fierce