Herbariums rhymes with:
aquariums, honorariums, aquariums, atriums, auditoriums, honorariums, moratoriums, abiam's, aquariums, atriums, auditoriums, axioms, caladiums, condominiums, consortium's, geraniums, gymnasiums, honorariums, idioms, mediums, millenniums, moratoriums, pentiums, petroleum's, podiums, premiums, stadium's, stadiums, symposiums, wiliams, zirconiums