Here are some other options, depending on the context:
* "Dzień dobry" (pronounced "dzen dobry") is a formal greeting, equivalent to "good morning" or "good afternoon".
* "Witam" (pronounced "vee-tam") is a formal greeting, equivalent to "greetings" or "hello".
* "Witaj" (pronounced "vee-tai") is a formal greeting, equivalent to "welcome" or "hello".
The best choice depends on the situation and your relationship with the person you are greeting.