Courage or confidence of a kind that other people find shocking or rude (Cambridge)
Behaviour that is brave but likely to shock or offend people (Oxford)
The sheer audacity of the plan amazed everyone. (Oxford)
He had the audacity to blame me for his mistake! (Cambridge)
sheer audacity of the plan
audacity to blame someone
Boldness
Bravery
Fear
Care
Audacious