assurance

[1]	promise , self-assurance , pledge , guarantee/guaranty , warranty , authority , sureness , commitment , bond , surety , word , word of honour , oath , vow
[2]	insurance , indemnity
[3]	certainty , confidence , trust , faith , reassurance , surety , assuredness , certitude , security
[4]	audacity , impudence , presumption , boldness , brazenness , nerve , effrontery , insolence , (Colloq) brass , gall , cheek , chutzpah
[5]	self-confidence , self-reliance , confidence , steadiness , intrepidity , self-possession , poise , aplomb , coolness , control , self-control , resolve , (Colloq) gumption , guts , gutsiness