1) Asinine 2) Bold 3) Brash 4) Daring 5) Foolish 6) Heedless 7) Rash 8) Reckless 9) Unwise 1) Bold 2) Brash and rash 3) Confuse author thomas 4) Foolishly rash or venturesome 5) Heedlessly rash 6) Marked by unthinking boldness 7) Rash 8) Reckless 9) That twit Thomas is rash 10) Trick Oliver 11) Wreckless 
• (a.) Daring without judgment; foolishly adventurous and bold.
Fool'har`dy adjective [ Old French folhardi . See Fool idiot, and Hardy .] Daring without judgment; foolishly adventurous and bold. Howell. Syn. -- Rash; venturesome; venturous; precipitate; reckless; headlong; incautious. See Rash .
[adj] - marked by unthinking boldness
foolhardy, foolhardiness Showing boldness or courage but not wisdom or good sense.
heady adjective marked by defiant disregard for danger or consequences; `foolhardy enough to try to seize the gun from the hijacker`; `became the fiercest and most reckless of partisans`-Macaulay; `a reckless driver`; `a rash attempt to climb Mount Everest...
recklessly or thoughtlessly bold; foolishly rash or venturesome.
marked by defiant disregard for danger or consequences[Intelligent words] marked by defiant disregard for danger or consequences