2 syllables:
boehner, bohner, bonar, boner, broner, cloner, croner, dohner, donor, droner, foner, goehner, groaner, groner, hoener, hoenir, hohner, honer, known her, kohner, kroener, kroner, kronor, loaner, lohner, loner, moaner, moner, owner, phoner, poner, rohner, schoener, shown her, soner, stoner, toner, zoner, zonnar

3 syllables:
atoner, bemoaner, bewohner, blood donor, chaloner, co-owner, coloner, componer, condoner, dethroner, einwohner, exponer, hizzoner, homeowner, imponer, intoner, jawboner, landowner, mineowner, ordonner, part-owner, postponer, pundonor, shareowner, shipowner, slaveowner, storeowner, sundowner, suponer, uptowner

4 syllables:
isotoner, organ donor, telephoner

5 syllables:
plantation owner, property owner

6 syllables:
universal donor

2 syllables:
fomor, homer, omar, roamer, romer, sonar

3 syllables:
editor, decolor, semaphore, sepulcher, nebular, hellebore, delaware, belshazzar, predator, headhunter, ecuador, creditor, metaphor, guenevere, specular, senator, messenger, settler, metamere, secretaire, escolar, leveller, debugger, elater, prelature, seminar, stepmother, sepulture, reckoner, megathere, reservoir, cellular, tetraspore, questioner, wrestler, seconder, sepulchre, pedaler, regular, medicare, megaspore, premolar, belabour, presenter, temperature, pensioner, reveler, stepbrother, stegosaur, secular, misnomer, sarcoma, sarcomere

4 syllables:
emmentaler, centromere, confectioner, noncellular, executor, dosemeter, irregular, expenditure, developer, molecular, acellular, misdemeanour, investiture, corregidor, text editor, room temperature, embezzler, competitor, ctenophore, solo homer

5 syllables:
body temperature, intracellular, primogenitor, extracellular, curie temperature, city editor, copy editor, linkage editor, chondrosarcoma, enantiomer, neurosarcoma

6 syllables:
managing editor, differentiator, absolute temperature, kaposi's sarcoma, osteosarcoma

7 syllables:
capital expenditure