What do you call a church in Hindi?

The most common word for "church" in Hindi is "चर्च" (church). It's a direct transliteration of the English word.

However, depending on the context, you might also use other terms:

* ईसाई मंदिर (īsāī mandir): This translates to "Christian temple", and is a more descriptive term.

* प्रार्थनालय (prārthanālaya): This means "prayer house" and can be used more broadly for places of worship, including churches.

The best choice will depend on the specific situation and the level of formality you need.