n. 25B6; adjective a spiral column of smoke : COILED, helical, corkscrew, curling, winding, twisting, whorled; technical voluted, helicoid, helicoidal.
25B6; noun a spiral of smoke : COIL, helix, corkscrew, curl, twist, gyre, whorl, scroll; technical volute, volution.
25B6; verb
smoke spiralled up : COIL, wind, swirl, twist, wreathe, snake, gyrate; poetic/literary gyre.
prices spiralled : SOAR, shoot up, rocket, increase rapidly, rise rapidly, escalate, climb; informal skyrocket, go through the roof.
the economy is spiralling downward : DETERIORATE, decline, go downhill, degenerate, worsen, get worse; informal take a nosedive, go to pot, go to the dogs, hit the skids, go down the tubes.
fall, improve.