Sentence:  Dyaus, the Bright- Shining-One-in-the-Heavens, or Maruna, the All-Surrounding, All- Enduring-One ; or Agni, the Everywhere-Present-One, became the <WSD>polynyms</WSD> for God. 
Meaning of the word marked with <WSD> tags:  One of multiple names for the same thing.