What is another word for outsider?

Here are some synonyms for "outsider," depending on the context:

General:

* Stranger

* Alien

* Foreigner

* Nonconformist

* Maverick

* Outcast

* Pariah

* Marginalized

* Unwelcome

More specific:

* Intruder (implies unwelcome presence)

* Outsider (implies someone who is excluded or does not belong)

* Peripheral (implies someone on the edge of a group)

* Uninitiated (implies someone who is not familiar with a particular group or activity)

* Bystander (implies someone who is observing but not participating)

* Renegade (implies someone who has broken away from a group)

* Heretic (implies someone who holds unorthodox beliefs)

* Dissident (implies someone who opposes a group or authority)

The best word to use will depend on the specific situation and the nuance you want to convey.