Definition of Zoroaster in English:
 Zoroaster
proper nounˌzɒrəʊˈastəˈzɔroʊˌæstər
(c.628–c.551 BC), Persian prophet and founder of Zoroastrianism; Avestan name Zarathustra. Little is known of his life, but traditionally he was born in Persia and began to preach the tenets of what was later called Zoroastrianism after receiving a vision from Ahura Mazda.
Rhymes
  
Antofagasta, aster, Astor, canasta, Jocasta, oleaster, pasta, piastre (US piaster), pilaster, poetaster, Rasta
   Definition of Zoroaster in US English:
 Zoroaster
proper nounˈzôrōˌastərˈzɔroʊˌæstər
(c.628–c.551 BC), Persian prophet and founder of Zoroastrianism; Avestan name Zarathustra. Traditionally, he was born in Persia and began to preach the tenets of what was later called Zoroastrianism after receiving a vision from Ahura Mazda.