Drub rhymes with:
grub, grubb, rub, scrub, shrub, strub, strubbe, bub, bubb, chubb, club, clubb, cub, dub, grub, grubb, hub, jubb, nub, pub, rub, scrub, shrub, snub, strub, strubbe, stub, stubbe, sub, tub, tubb
Drub sounds like:
darby, darpa, dauterive, deharbe, derby, derive, diatribe, dorf, dorff, drab, drape, drapeau, dravo, drip, drive, drive-by, driveway, droop, droopy, drop, drop-off, dropoff, drove, drupe, durfee, durfey, dwarf