(a.) Too zealous.

accident-prone at fever pitch balking balky bigoted breakneck bulldogged bulletheaded bullheaded careless case-hardened delirious desperate devil-may-care dogged dogmatic extravagant extreme extremist fanatic fanatical febrile feverish frantic frenetic frenzied furious haggard hardheaded harum-scarum hasty headlong headstrong hectic hotheaded hurried hysteric impetuous infatuated inordinate insane intolerant irrational mad mulish obstinate opinionated overanxious overdesirous overdevout overeager overenthusiastic overreligious overrighteous perfervid persevering pertinacious pigheaded precipitant precipitate precipitous rabid reckless restive sanctimonious self-willed set slap-bang slapdash stiff-necked strong-willed strongheaded stubborn sulky sullen tenacious ultrareligious ultrazealous uncooperative unreasonable unregenerate wanton wild wild-eyed wild-looking willful zealotic zealous