Here's what rhymes with semicolumnar.
columnar Words that almost rhyme with semicolumnar
polymer commoner gossamer colander gardener monomer coroner conifer softener gobbler bolivar gossiper rottener monitor carpenter corridor foreigner consular forerunner modular basilar nodular godmother hardener modeler sharpener jobholder darkener uncommoner popular forfeiture globular kilometer micrometer forester jocular kilometre lobular quadrature saltpetre harvester marketer odometer mortgager hosteller twaddler milometer quarreler tobogganer philosopher biographer thermometer astronomer geographer portraiture astrologer hardcover monocular anemometer blockbuster speedometer hygrometer extortioner pedometer sparkler cyclometer hectometer kindergartener hectometre mileometer snorkeller photographer unpopular binocular spectrometer interferometer interlocutor choreographer hydrometer magnetometer demographer proconsular hagiographer lexicographer bibliographer cinematographer oceanographer radiographer pornographer seismographer autobiographer historiographer