Synonyms and related words :
air space, ample scope, blank check, carte blanche, clearance, field, free course, free hand, free play, free scope, full scope, full swing, headroom, latitude, leeway, long rope, maneuvering space, margin, no holds barred, open space, play, range, room, room to spare, rope, scope, sea room, space, spare room, swing, tolerance, way, wide berth