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