Here are some options:
Formal:
* Kia ora: This is the most common greeting, meaning "hello" or "good health". It can be used in all situations.
* Tena koe: This is a more formal greeting, meaning "greetings to you". It's used for someone you don't know well or in a more formal setting.
Informal:
* Ata: This greeting is used in the morning. It means "morning" or "good morning".
* Ahiahi: This greeting is used in the afternoon. It means "afternoon" or "good afternoon".
* Mārena: This greeting is used in the evening. It means "evening" or "good evening".
* Mauri ora: This greeting means "good health" or "wellbeing". It's a very friendly greeting, but it can also be used in formal settings.
Other options:
* Haere mai: This means "welcome" and can be used as a greeting when someone arrives.
* Tēnā rā: This means "greetings to you" and is a more formal greeting than "kia ora".
It's important to note that the correct greeting will vary depending on the context and the time of day.