a positive declaration intended to give confidence

He received assurances of support for the project.

promise or pledge; guaranty; surety

He gave his assurance that the job would be done.

full confidence; freedom from doubt; certainty

to act in the assurance of success.

freedom from timidity; self-confidence; belief in one's abilities

She acted with speed and assurance.

presumptuous boldness; impudence.

Chiefly British . insurance.

noun

distrust , doubt , confusion , fear , hesitancy , misgiving , shyness , uncertainty

noun

affirmation , assertion , declaration , guarantee , insurance , lock * , lock on , oath , pledge , profession , promise , rain or shine , security , shoo-in , support , sure thing * , vow , warrant , warranty , word , word of honor , aggressiveness , aplomb , arrogance , assuredness , audacity , boldness , bravery , certainty , certitude , conviction , coolness , courage , effrontery , faith , firmness , impudence , nerve , poise , positiveness , presumption , self-confidence , self-reliance , sureness , surety , temerity , trust , covenant , engagement , guaranty , plight , solemn word , confidence , safeness , self-assurance , self-possession , belief , brass , cockiness , credit , say so