Lumbago rhymes with:
amigo, archipelago, bargo, belgo, bongo, cargo, chicago, fandango, fargo, genego, gogo, hidalgo, indigo, outgo, papago, pogo, seago, sego, shawgo, vertigo, vidigo, wargo
Lumbago sounds like:
lamb's, lambiase, lambs, lambs', lamps, leimbach, leinbach, lembcke, lembke, lempke, limbach, limbaugh, limbaugh's, limbs, limps, lineback, linebaugh, lineups, lompoc, lumps