Laventhol rhymes with:
pentothal, agarwal, aircal, algol, berdahl, bergdahl, bergendahl, biocontrol, castrol, caterwaul, clairol, consol, ebersol, engdahl, erdahl, ethyol, ewbal, felbatol, filtrol, firewall, jaspal, jordahl, kcal, kufahl, liljedahl, lubrizol, malval, naral, nordahl, o'driscoll, odriscoll, offerdahl, oftedahl, opsahl, pentothal, phenol, photocall, pofahl, pufahl, ransall, repsol, ringdahl, sandall, scurdall, snowfall, stordahl, stovall, sturdhal, topol, tricentrol, vertol, vorpahl
Laventhol sounds like:
laubenthal, lebenthal, leventhal