1 syllable:
boil, boyle, broil, choil, coil, coile, coyle, croyle, doyle, droil, droyle, foil, foyle, hoyle, meule, moile, moyl, moyle, oil, quoil, roil, royle, scroyle, sgoil, soil, soyle, spoil, toil, toile, voile

2 syllables:
aboil, accoil, airfoil, amsoil, anoil, assoil, bath oil, bemoil, benzoyl, birch oil, bog soil, bone oil, britoil, caproyl, char-broil, charbroil, choke coil, cinqfoil, coal oil, cod oil, coiled-coil, corn oil, crude oil, despoil, emboil, embroil, entoil, estoile, etoile, fermoyle, field coil, fish oil, fixed oil, free-soil, gaelscoil, garboil, gargoyle, gasoil, gas oil, gatoil, gold foil, guilfoil, gumboil, gurgoyle, hair oil, hard-boil, imboil, jetfoil, kinoyl, lard oil, leaf soil, lukoil, milfoil, night soil, o'boyle, oboyle, octoyl, outtoil, palm-oil, palm oil, pan-broil, parboil, pennzoil, potboil, quinoyl, rape oil, re-coil, reboil, recoil, rockfoil, rock oil, rose oil, seal oil, septfoil, setfoil, sexfoil, shale oil, shark oil, snake-oil, snakeoil, snake oil, spark coil, sparpoil, sperm oil, spike oil, stand oil, statoil, subsoil, sweet oil, tall oil, tinfoil, tin foil, topsoil, train oil, trefoil, tung oil, turmoil, uncoil, unoil, upcoil, whale-oil, whale oil, wool oil

3 syllables:
aerofoil, almond oil, baby oil, bel-accoyle, bio-oil, carbamoyl, carron oil, castor-oil, castor oil, choking coil, cinquefoil, conan doyle, cooking oil, copra oil, counterfoil, delhi boil, desert soil, diesel oil, disembroil, dolphin oil, drying oil, engarboil, fatty oil, feather-foil, featherfoil, flaxseed oil, fossil oil, fuel oil, groundnut oil, gumbo soil, heating oil, hexafoil, hispanoil, holy oil, hydrofoil, hyssop oil, iqfoil, lemon oil, linseed oil, motor oil, nagercoil, oleoyl, olive oil, oven broil, overboil, overtoil, parafoil, peanut oil, perdifoil, polyfoil, porpoise oil, prairie soil, quadrifoil, quarterfoil, quatrefoil, quintefoil, rapeseed oil, rotor coil, salad oil, salmon oil, sardine oil, soybean oil, supercoil, surface soil, susan boyle, tallow oil, telecoil, tesla coil, tuna oil, tundra soil, undersoil, walnut oil, wormwood oil

4 syllables:
a. conan doyle, aniline oil, animal oil, banana oil, chinese wood oil, coconut oil, cod liver oil, cottonseed oil, essential oil, ignition coil, induction coil, madia oil, menhaden oil, mineral oil, oleo oil, paraffin oil, peppermint oil, primary coil, safflower oil, sassafras oil, sesame oil, sunflower oil, sweet almond oil, vegetable oil, volatile oil

5 syllables:
alluvial soil, aluminum foil, arthur conan doyle, bitter almond oil, eucalyptus oil, expressed almond oil, lubricating oil, residual soil, secondary coil, spike lavender oil

6 syllables:
sir arthur conan doyle