discretionary

discretionary
    adj 1: having or using the ability to act or decide according to
           your own discretion or judgment; "The commission has
           discretionary power to award extra funds" [syn:
           {discretionary}, {discretional}]
    2: (especially of funds) not earmarked; available for use as
       needed; "discretionary funds"; "discretionary income"
    

Discretional \Dis*cre"tion*al\, Discretionary
\Dis*cre"tion*a*ry\, [Cf. F. discr['e]tionnaire.]
   Left to discretion; unrestrained except by discretion or
   judgment; as, an ambassador with discretionary powers.
   Discretionally
    

35 Moby Thesaurus words for "discretionary":
      arbitrary, autonomous, discretional, elective, free, free will,
      gratuitous, independent, nonmandatory, offered, optional,
      proffered, self-acting, self-active, self-determined,
      self-determining, spontaneous, unasked, unbesought, unbidden,
      uncalled-for, uncoerced, uncompelled, unforced, uninfluenced,
      uninvited, unpressured, unprompted, unrequested, unrequired,
      unsolicited, unsought, voluntary, volunteer, willful