The Collaborative International Dictionary of English v.0.48:

Parjanya \Parjanya\ prop. n.
   1. (Hinduism) The Hindu god of rain; sometimes identified
      with Indra.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

Indra
    n 1: chief Hindu god of the Rig-Veda; god of rain and thunder

Moby Thesaurus II by Grady Ward, 1.0:

58 Moby Thesaurus words for "Indra":
   Agni, Asvins, Avalokita, Bhairava, Bhairavi, Brahma, Chandi,
   Daksha, Devaki, Devi, Dharma, Dharti Mai, Donar, Durga, Dyaus,
   Ganapati, Ganesa, Ganesha, Garuda, Hanuman, Himavat,
   Jupiter Tonans, Kali, Kama, Kamsa, Karttikeya, Lakshmi, Parjanya,
   Parvati, Pushan, Rahu, Rhibhus, Rudra, Sarasvati, Savitar, Shiva,
   Sita, Soma, Surya, Thor, Uma, Ushas, Vaja, Varuna, Varuni, Vayu,
   Vishnu, Yama, deep, dread rattling thunder, peal of thunder,
   thunder, thunderclap, thundercrack, thundering, thunderpeal,
   thunderstorm, thunderstroke