1) Defencelessness 2) Helplessness 3) Impotence 4) Impotency 5) Inability 6) Incapacity 7) Quality 8) Vulnerability 9) Weakness 1) Helplessness 2) Impotence 3) Impotency 4) Impuissance 5) Incapability 6) Ineffectiveness 7) Ineffectuality 8) Ineffectualness 9) Injury 10) Uninterestingness 11) Unpersuasiveness 
[n] - the quality of lacking strength or power
impotence noun the quality of lacking strength or power; being weak and feeble