2 syllables:
still in, tilan, till in, trillin, trilon, bilin, billen, billon, bill in, brillen, chilin, chillan, chillin, chillon, chill in, chilon, cuillin, dhillon, dilan, dillan, dillen, dillin, dillon, drill in, dylan, fillan, fill in, gillan, 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, villain, villan, villin, villon, willen, willin, will in, yilin

3 syllables:
tefillin, until in, 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, vanillin

4 syllables:
ticarcillin, 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, wuheqilin

5 syllables:
amdinocillin, amoxicillin, amoxycillin, asia kate dillon, 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