Here are some other words that can be used:
* కాపలాదారు (kaapalaadaaru) - guard
* రక్షకుడు (rakshakkudu) - protector
* సంరక్షకుడు (samrakshakkudu) - guardian
* గేటుకానిపాటి (gaetukanipaati) - gatekeeper
The best word to use will depend on the specific context. For example, "kanipaati" is a more general term, while "gaetukanipaati" is specifically for someone who guards a gate.