spontaneously Synonyms

impromptu ad libitum ad lib but of course on a dime offhandedly unaffectedly impetuously extemporaneously unconsciously by nature unrehearsed off-the-cuff unintentionally Camembert cheese willingly on impulse on the fly uninhibitedly off your own bat without preparing without thinking without being asked without prompting without rehearsal without preparation on the spur of the moment volitionally unthinkingly unprompted unpretentiously unwittingly voluntary voluntarily spontaneous headfirst hastily freely extempore extemporarily discretionarily discretionally designedly casually automatically artlessly alimentally accidentally impulsively informally