Biospherians rhymes with:
assyrians, liberians, nigerians, presbyterians, syrians, zairian's, zairians, aeriens, algerians, assyrians, austrians, barbarians, bilzerian's, bulgarians, cambrian's, carrian's, centenarians, contrarians, disciplinarians, dorians, hadrian's, historians, humanitarians, hungarians, ivorians, kazarian's, kerkorian's, liberians, libertarians, librarians, marian's, marion's, missourians, nigerians, parliamentarians, pedestrians, presbyterians, seminarians, singaporeans, syrians, totalitarians, vegetarians, veterinarians, victorians, zairian's, zairians