2 syllables:
bilin, billen, billon, bill in, brillen, chilin, chillan, chillin, chillon, chill in, chilon, cuillin, dhillon, dilan, dillan, dillen, dillin, drill in, dylan, fillan, fill in, gillan, gillean, gillen, gillin, gillon, grillen, guilin, guillen, hillen, hillin, hill in, ill in, jilin, kilen, kilin, killen, killin, kill in, krillin, lilin, millan, millen, millin, milline, millon, mill in, milon, nylen, philon, pilin, pillon, qilin, quillan, quillen, quillin, quillon, quilon, scillain, shilin, sillon, skillen, skillin, skill in, spillane, stillen, still in, tilan, till in, trillin, trilon, villain, villan, villin, villon, willen, willin, will in, yilin

3 syllables:
anguillan, ardillon, astyllen, attilan, bacillin, balilan, barbillon, bouillon, brasilin, brazilin, brazil in, brezilin, castillan, chinchillon, cotillon, fan yilin, gavilan, geyelin, gilfillan, instill in, macmillan, mcgillen, mcmillan, mcmillen, mcmillian, mcmillin, mcmillon, mcquillan, mcquillen, mcquillin, morillon, motilin, nafcillin, orillon, parillin, pavillon, prairillon, resilin, roussillon, santillan, tefillin, until in, vanillin

4 syllables:
aidan gillen, ampicillin, aspergillin, carfecillin, cascarillin, cloxacillin, court-bouillon, cyclacillin, cyclophilin, enniskillen, epicillin, floxacillin, fumagillin, jakob dylan, karen gillan, methicillin, mezlocillin, oxacillin, oxicillin, penicillin, penicilline, phycobilin, picamilon, polycillin, rasagiline, sk-ampicillin, stercobilin, ticarcillin, wuheqilin

5 syllables:
amdinocillin, amoxicillin, amoxycillin, carbenicillin, caryophyllin, dicloxacillin, ethylvanillin, flucloxacillin, mycobacillin, piperacillin, pivampicillin, sarsaparillin, siderophilin

6 syllables:
benzylpenicillin, canet-en-roussillon, languedoc-roussillon, murder of grace millane

9 syllables:
phenoxymethylpenicillin