dauntless (adj.)

• audacious
• aweless
• bold
• brave
• confident
• courageous
• daring
• fearless
• gallant
• game
• gritty
• gutsy
• heroic
• indomitable
• intrepid
• invincible
• lionhearted
• mettlesome
• plucky
• spunky
• stalwart
• unafraid
• unapprehensive
• unconquerable
• undaunted
• unfearing
• unflinching
• unfrightened
• valiant
• valorous
• venturesome