Formal:
* مرد (mard): This is the most common and formal way to say "man".
Informal:
* آقا (āqā): This is a respectful term used to address a man, similar to "sir". It can also be used informally to refer to a man, similar to "guy" or "dude".
* پسر (pesar): This literally means "son", but can be used informally to refer to a man.
Other:
* مردم (mardom): This means "people" and can be used to refer to men collectively.
The specific word you use will depend on the situation and the level of formality you want to express.