々 repeats the kanji before it, and the second かみ becomes がみ.
Common collocations
- 八百万の神々: the countless gods of Shinto (literally "eight million")
- ギリシャ神話の神々: the gods of Greek mythology
- 神々の怒り: the wrath of the gods
Watch out
The adjective 神々しい (divine, sublime) is read こうごうしい, not かみがみしい.