spunky (adj.)

• bold
• combustible
• courageous
• dauntless
• explosive
• fearless
• fiery
• game
• gamy
• gritty
• gutsy
• hasty
• high-spirited
• hot
• hot-tempered
• hotheaded
• mettlesome
• nervy
• passionate
• peppery
• pertinacious
• plucky
• quick
• quick-tempered
• red-blooded
• resolute
• short-tempered
• spirited
• tenacious
• tough
• unfearing
• volcanic