3 letters:
kol, ohl, ol', ole, rol

4 letters:
boal, bohl, bole, boll, bowl, buol, coal, cole, dole, foal, fohl, goal, gohl, hoel, hohl, hole, kohl, kole, mohl, mole, nohl, nole, noll, pohl, pole, poll, rohl, role, roll, sole, soul, stol, toal, tole, toll, wohl

5 letters:
abrol, anole, atole, atoll, bemol, boehl, boell, bowle, chole, coale, colle, creol, croll, dhole, dipol, doell, drole, droll, ecole, extol, foale, ghole, goehl, gogol, groel, groll, hoell, idole, isole, jehol, kajol, knole, knoll, koehl, metol, noale, noell, nolle, obole, opole, oriol, parol, pfohl, poehl, prole, proll, quoll, roehl, roell, rolle, schol, scole, seoul, shoal, shole, skoal, skole, snowl, sotol, sowle, stohl, stole, stoll, thole, tirol, toyol, troll, viole, vitol, voell, whole, wholl, woehl

6 letters:
abenol, acetol, aihole, amcole, anatol, aperol, arsole, b-roll, cajole, cardol, cineol, citole, devaul, dipole, ecbole, embowl, enroll, ensoul, erroll, extoll, f-hole, formol, gambol, glycol, hoelle, indole, inroll, jawohl, jehoel, k-hole, karole, knoell, koelle, lt col, madole, mccole, mccoll, mcdole, medrol, moelle, mohole, nicole, nitrol, obwohl, ongole, oriole, osmole, otoyol, pagnol, pajole, parole, patrol, pinole, polyol, posole, proehl, reroll, resole, ripoll, rissol, roelle, schaul, scroll, sowohl, sp vol, strohl, strole, stroll, thoele, toelle, triole, unroll, uproll, vesoul, wacoal

7 letters:
ab-soul, airhole, alepole, anadrol, anatole, anisole, ashmole, azarole, bagnole, bedroll, bedsole, borneol, bricole, bumhole, cariole, cathole, chabrol, cineole, condole, console, control, coupole, creosol, danazol, dariole, diazole, doghole, earhole, epibole, escroll, espanol, europol, eyehole, fiesole, filgoal, foliole, foxhole, gondole, harpole, hewhole, humbrol, in-goal, indazol, j. cole, keyhole, logroll, lughole, mainbol, manhole, maybole, maypole, mendole, midsole, monggol, monopol, mudhole, musrole, nardole, nicolle, nikopol, no-goal, nucleol, onahole, ostiole, outpoll, outsole, patrole, payroll, peehole, petiole, pi-hole, piehole, pinhole, pistole, pothole, punggol, pyrrole, rathole, redpole, redpoll, rissole, scholle, schroll, seacoal, sithole, skatole, sozopol, spyhole, subgoal, systole, tadpole, taphole, toluole, turiole, unwhole, urceole, variole, walpole, wampole, zeppole

8 letters:
agricole, air hole, amitrole, anethole, antipole, arvicole, ass-hole, asystole, bankroll, beadroll, beanpole, bestiole, blogroll, blowhole, bluepoll, boerboel, bolthole, borecole, borehole, braciole, bunghole, butthole, cakehole, camisole, capriole, caracole, carriole, cat-hole, charcoal, claypole, clodpole, clodpoll, clotpoll, coalhole, coloroll, comptrol, controle, cornhole, craphole, day-coal, denehole, downhole, drumroll, dustbowl, ear hole, ebersole, egg roll, enscroll, escarole, espagnol, espanole, eversole, fasciole, firepole, fishbowl, flagpole, forepole, fox hole, freeroll, fumarole, fumerole, girasole, gloriole, glycerol, gunkhole, heatwole, hellhole, hexadrol, hop pole, humicole, hypobole, imidazol, imp-pole, inscroll, interpol, jackroll, kilnhole, kilomole, kneehole, knothole, limicole, loophole, ma'amoul, man-hole, marysole, metazoal, metrazol, metropol, miglitol, monopole, muscimol, nanomole, neo-soul, nosehole, nucleole, ovariole, oversoul, peephole, pesthole, picomole, pie-hole, pimproll, pit-hole, plimsole, plughole, poophole, pop-soul, porthole, posthole, pot-hole, procoele, pyrazole, quinazol, quintole, red cole, red poll, rickroll, riluzole, rosebowl, rougeole, santalol, saxicole, sea coal, sea cole, seminole, sinkhole, ski pole, slipsole, stamboul, t.s.o.l., ternopol, top-hole, traphole, trapsoul, triazole, tubicole, uwe boll, venthole, virazole, washbowl, wellhole, woodhole, zandmole

9 letters:
amphibole, apsidiole, arenabowl, arteriole, bargepole, bead-roll, bean-pole, blackhole, blockhole, bolt-hole, bore-hole, braunkohl, bung-hole, cake-hole, calcicole, campagnol, caprifole, carambole, casserole, catchpole, cencoroll, centriole, chuckhole, clickhole, clycerole, coal-hole, control-x, creephole, crokinole, cubbyhole, dead soul, decontrol, deed poll, dicumarol, disenroll, drum roll, duck-mole, dust bowl, espagnole, farandole, femke bol, finntroll, finn cole, fredstole, funk hole, gary cole, girandole, glycerole, grathwohl, gray sole, half-sole, half sole, hand-hole, hand-roll, hard coal, hard roll, hawsehole, hidy-hole, hydrozoal, innersole, iprindole, jellyroll, lignicole, lodgepole, maryknoll, mesocoele, metropole, micromole, millimole, mousehole, multipole, nail hole, optocoele, parembole, peristole, phenetole, piacevole, pipe bowl, pitchpole, post hole, primerole, punchbowl, rantipole, rent-roll, ridgepole, rigmarole, rocambole, rocknroll, rokambole, sand sole, septimole, shot hole, sighthole, sink-hole, slop bowl, snap roll, soft coal, soft roll, soundhole, soup bowl, spongiole, stackpole, steamroll, stokehole, superbowl, terricole, tetrazole, thumbhole, timo boll, touchhole, vent-hole, waterhole, wood coal

10 letters:
1-propanol, actinozoal, airconsole, arboricole, ascaridole, as a whole, barge pole, battlebowl, bibliopole, black-hole, black hole, blumenkohl, brown coal, buttonhole, carmagnole, cubby-hole, david soul, death-roll, dicoumarol, dienestrol, drill hole, dyscontrol, field goal, glory hole, hidey-hole, huliaipole, isosafrole, kasserolle, lemon sole, levamisole, metamizole, minor role, mouth hole, myelocoele, neurocoele, nick kroll, nimorazole, north pole, omeprazole, onion roll, ozone hole, paludicole, paw patrol, pigeonhole, pratincole, presystole, prosocoele, punch bowl, quadripole, quadrupole, quinestrol, range pole, retro-soul, rigamarole, ropinirole, rudderhole, salad bowl, sertindole, sevastopol, sight-hole, simferopol, sitosterol, smoke hole, sound hole, south pole, squaterole, steam coal, sugar bowl, sweet roll, teaze-hole, technitrol, technopole, title role, totem pole, touch-hole, tubulicole, typhlosole, vanderpoel, water hole

11 letters:
anastrozole, barrel roll, blastocoele, bullet hole, button hole, cavernicole, cefamandole, cereal bowl, church roll, cinnamoroll, coffee roll, corey stoll, counterpole, croquignole, doom patrol, enterocoele, eucalyptole, eurocontrol, finger-roll, finger bowl, finger hole, golden mole, gopher hole, gun control, heart-whole, hemisystole, job control, kaiser roll, latebricole, milliosmole, mixing bowl, moomintroll, muster roll, parasystole, pass-parole, perisystole, phytosterol, pigeon-hole, profiterole, pseudocoele, punsch-roll, rabbit hole, rabeprazole, rhabdocoele, rock'n'roll, rock-n-roll, rockihnroll, schizocoele, screech-owl, spring roll, stilbestrol, telecontrol, toilet bowl, toilet roll, vienna roll, whac-a-mole

12 letters:
acylglycerol, alexandropol, aripiprazole, arms control, birthcontrol, counter-roll, english sole, esomeprazole, ethohexadiol, extrasystole, fire-control, fire control, fishing pole, lance stroll, lansoprazole, lose control, metarteriole, midway atoll, natalie cole, on the whole, pantoprazole, procentriole, ranging pole, riot control, sausage-roll, sausage roll, self-control, semiologioal, shore patrol, sturmpistole, swallow hole, syringocoele, take control, tetrapyrrole, thalamocoele, through-hole, volkspistole, whack-a-mole

13 letters:
acenocoumarol, aleksandropol, aminotriazole, barber's pole, benzotriazole, birth control, body and soul, border patrol, brewer's mole, brexpiprazole, cinnamon roll, crescent roll, crowd control, european sole, flood control, golden oriole, magnetic pole, motor control, negative pole, nissan patrol, pick-and-roll, positive pole, price control, rock-and-roll, rock and roll, swimming hole, touch-in-goal, under control, watering hole

14 letters:
beyond control, blue-eyed soul, celestial pole, cruise control, damage-control, damage control, diacylglycerol, fillet of sole, hamburger roll, heart and soul, heavydirtysoul, hetton-le-hole, hydroxyanisole, marsupial mole, orchard oriole, remote-control, remote control, robert walpole, social control, summer of soul, telegraph pole, telephone pole

15 letters:
american oriole, anthracite coal, beta-sitosterol, bituminous coal, content-control, desoxypipradrol, dexlansoprazole, electric dipole, gaining control, lawrence stroll, magnetic dipole, northern oriole, quality-control, quality control, theatrical role, traffic control, triacylglycerol

16 letters:
baltimore oriole, bullock's oriole, domenico de sole, maximumrocknroll, military control, monoacylglycerol, new world oriole, old world oriole, toad-in-the-hole

17 letters:
chicken casserole, inventory control, magnetic monopole, parker house roll, pentylenetetrazol

18 letters:
activated charcoal, diethylstilbestrol, pentylenetetrazole, population control, sir robert walpole

19 letters:
hockley-in-the-hole, public opinion poll

20 letters:
hydroxybenzotriazole, inversion of control, north celestial pole, phosphatidylglycerol, south celestial pole

21 letters:
hexafluoro-2-propanol

22 letters:
2-arachidonoylglycerol, negative magnetic pole, pentamethylenetetrazol, positive magnetic pole

23 letters:
kola superdeep borehole, supermassive black hole

26 letters:
center for disease control, decksandrumsandrockandroll, list of wars by death toll

30 letters:
rhythm method of birth control

32 letters:
calendar method of birth control