iniini inirti intron irinti izotip izoton izotop nitrin nitrit nitro- norito norton option otozit ozonür pinpin pinpon pirpir pirpit pitpit ponpon ponton pontür poroit potpot propin proton rizoit roptri tinpir tintin tinton tintoz tipiti tiptip tipton tiroit tirpit tizpon tontin tonton topton toptop torino tornio tortop tortor totopo triton tropin zipzop zirzop zirzor zontor zoonoz üzüntü