Here's what rhymes with omnom.
Words that almost rhyme with omnom
conman autumn awesome bonum wampum bottom column solemn forum boredom mortem balsam condom dorsum sorghum possum foursome carom problem quantum blossom quorum drachm nostrum rostrum flotsam opossum stardom thraldom slalom thralldom cockscomb decorum metronome gastronome sugarplum postpartum microcosm falciparum macrocosm