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