defence

dɪˈfɛns

noun

the action of defending from or resisting attack.

methods of defence against this kind of attack

protection,shielding,safeguarding,guarding,security,fortification,cover,shelter,screen,resistance,deterrent,vindication,justification,support,advocacy,approval,endorsement,promotion,apology,apologia,explanation,explication,excuse,extenuation,exoneration,palliation