The word "historionomer" is a combination of "historio-" meaning history and "-nomer" meaning namer or nomenclature. The pronunciation of this word is /hɪˈstɔːrɪˌɒnəmə(r)/. The first syllable is pronounced with a short "i" as in "hit", followed by a stress on the second syllable. The "-io-" in the first syllable is pronounced with a long "o" as in "hope". The "-nomer" in the second syllable is pronounced with a short "o" as in "off" and a schwa sound for the second "e".