1) Detached 2) Independent 3) Separate 4) Standing alone 5) Standing apart 
(in the round): sculpture standing alone, usually on a pedestal or base: sculpture not attached to a background or wall (in contrast to Relief)
[adj] - standing apart
separate adjective standing apart; not attached to or supported by anything; `a freestanding bell tower`; `a house with a separate garage`
Staircase which is not supported by walls. Open underneath.
A term for tents that do not need guy lines.
(of sculpture or architectural elements) unattached to a supporting unit or background; standing alone. · not affiliated with others of its kind; independent; autonomous: a freestanding clinic, not connected with any hospital.