temerity

Synonyms: assurance boldness brass carelessness daring effrontery foolhardiness forwardness gall hardihood hastiness heedlessness impertinence impetuosity imprudence impudence impulsiveness indiscretion intrepidity intrusiveness overconfidence pluck precipitancy precipitateness precipitation presumption rashness recklessness rudeness thoughtlessness venturesomeness

Antonyms: care caution cowardice forethought hesitation