What is the word that means peace or hello?

There isn't one single word that means both "peace" and "hello". However, depending on the context and language, there are some words that could be used to convey both greetings and a sense of peace:

In English:

* Shalom: This Hebrew word, often used as a greeting, translates to "peace" and can be used as a farewell.

* Namaste: This Sanskrit word means "I bow to the divine in you" and can be used as a greeting or farewell, emphasizing respect and peace.

* Peace: While not strictly a greeting, it can be used to convey a peaceful sentiment and can be used as a farewell.

In other languages:

* Salam: (Arabic) This word means "peace" and is often used as a greeting.

* As-salamu alaykum: (Arabic) This phrase means "peace be upon you" and is a common greeting.

It's important to note that the specific meaning of these words can vary depending on the context and cultural understanding.