Here's what rhymes with invitandum.
tandem random memorandum nonrandom Words that almost rhyme with invitandum
tantum bantam abandon phantom canton dampen plantain zooplankton phytoplankton handsome datum madam ransom madame tantrum hansom transom talcum pablum maxim platinum chasm fathom spasm magnum plasm sachem stratum amalgam macadam phantasm gladsome sphagnum enthusiasm neoplasm sanctum cytoplasm substratum tarmacadam protoplasm iconoclasm