1) Arbitrariness 2) Exemption 3) Flightiness 4) Immaturity 5) Impetuosity 6) Irresponsibleness 7) Undependability 8) Undependableness 9) Unreliability 10) Unreliableness 11) Whimsicality 
• (n.) Want of, or freedom from, responsibility or accountability.
The state of not acting in a manner that is responsible, for conscious or unconscious reasons. ... Criminal irresponsibility, the state, usually attributed to mental defect or disease, that renders a person not responsbile for his criminal conduct. ... (05 Mar 2000) ... 
Ir`re·spon`si·bil'i·ty noun [ Confer French irresponsabilité .] Want of, or freedom from, responsibility or accountability. 
Type: Term Pronunciation: ir′rē-spons′i-bil′i-tē Definitions: 1. The state of not acting in a responsible manner for conscious or unconscious reasons.
[n] - a form of untrustworthiness
irresponsibleness noun a form of untrustworthiness; the trait of lacking a sense of responsibility and not feeling accountable for your actions