What rhymes with omnicom's?

Omnicom's rhymes with:

millicom's, millicom's, sitcoms, telecom's, telecoms, telekom's, viacom's, guilliams, iams, millicom's, pompoms, sitcoms, telecom's, telecoms, telekom's, viacom's

Omnicom's sounds like:

omissions, oncogenes, oncoming, ongoing

What rhymes with omnicom's?