1) Capriciousness 2) Changeableness 3) Changefulness 4) Faithlessness 5) Fickleness 6) Inconstance 7) Infidelity 8) Unconstancy 9) Unpredictability 1) Faithlessness 2) Falseness 3) Fickleness 4) Infidelity 5) Unfaithfulness 
• (n.) The quality or state of being inconstant; want of constancy; mutability; fickleness; variableness.
In·con'stan·cy noun [ Latin inconstantia .] The quality or state of being inconstant; want of constancy; mutability; fickleness; variableness. « For unto knight there was no greater shame, Than lightness and inconstancie in love.» Spenser. 
[n] - the quality of being changeable and variable
changefulness noun the quality of being changeable and variable