2 syllables:
a ber, blubber, bubber, cibor, clubber, drubber, dubber, flubber, grubber, hubur, liber, lubber, rubber, rub her, scrubber, slubber, snubber, stubber, subir, tubber, zabur

3 syllables:
beblubber, beslubber, cold rubber, crepe rubber, foam rubber, hard rubber, landlubber, nightclubber, octubre, sea-blubber

4 syllables:
abbey-lubber, india-rubber, money-grubber, moneygrubber, para rubber

5 syllables:
indiarubber, india rubber, silicone rubber, synthetic rubber

2 syllables:
whooper, booger, snooper, lucre, sucre, neuter, pewter, super, suitor, grouper, hooter, stupor, boudoir, euchre, cougar, brooder, tutor, blooper, looter, looper, cooter, cooper, scooter, souter, tudor, shooter, luger, sudor, mucor, trouper, trooper, blucher, bugger, butter, clutter, crupper, cupper, cutter, flutter, gutter, judder, lugger, mugger, mutter, plugger, pucker, putter, rudder, rugger, scupper, shudder, shutter, slugger, splutter, sputter, stutter, succor, sucker, supper, trucker, tucker, udder, upper, utter

3 syllables:
storm trooper, recruiter, commuter, computer, square shooter, accouter, croupier, accoutre, intruder, abutter, aflutter, bolt cutter, brown butter, cheese cutter, debugger, drawn butter, gem cutter, glasscutter, glass cutter, hog sucker, last supper, lord's supper, nut butter, pipe cutter, rebutter, shot putter, shrimp butter, snail butter, stone cutter, tile cutter, unclutter, yak butter

4 syllables:
involucre, motor scooter, party pooper, commutator, apple butter, bib-and-tucker, bread and butter, cigar cutter, cocoa butter, colbert butter, garlic butter, garment cutter, hugger-mugger, hugger mugger, lemon butter, lobster butter, onion butter, paper cutter, peanut butter, surrebutter, wire cutter

5 syllables:
desktop computer, laptop computer, microcomputer, minicomputer, mainframe computer, anchovy butter, clarified butter, passover supper

6 syllables:
digital computer, analogue computer, portable computer, personal computer, analog computer, linoleum cutter