Lumber rhymes with:
slumber, cumber, encumber, humber, macumber, mccumber, number, outnumber, slumber, unencumber
Lumber sounds like:
laimbeer, lambreau, lambro, lamphear, lamphere, lamphier, lamprey, lanfear, lanphear, lanpher, lanphere, lanphier, lehenbauer, leinweber, limber, lineberry, lineweaver, lumbar, lumbra, lumper, lumpur