Here's what rhymes with osm.
microcosm macrocosm Words that almost rhyme with osm
awesome often rosin possum caution blossom cation soften opossum libation precaution herniation tryptophan calumniation autumn bottom column solemn forum bonum carom boredom mortem quorum balsam condom dorsum sorghum wampum foursome slalom problem quantum decorum drachm nostrum rostrum flotsam stardom thraldom thralldom cockscomb metronome gastronome sugarplum postpartum falciparum