automatic
arbitrary
automated
automatous
autonomous
cybernated
discretional
discretionary
elective
free
free will
gratuitous
independent
nonmandatory
offered
optional
proffered
self-active
self-adjusting
self-closing
self-controlled
self-cooking
self-determined
self-determining
self-directed
self-directing
self-dumping
self-governed
self-governing
self-lighting
self-operative
self-regulative
self-starting
self-winding
self-working
semiautomatic
spontaneous
unasked
unbesought
unbidden
uncalled-for
uncoerced
uncompelled
unforced
uninfluenced
uninvited
unpressured
unprompted
unrequested
220-volt
bomb-throwing
central-office
complicated-looking
dynamo-electric
fire-fighting
floor-mounted
heart-lung
labor-saving
magneto-electric
metal-cutting
much-deserved
pack
power-driven
pro-gay
sightly
solar-powered
sumpter
ultraviolet
warp-capable