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