noun. One who avoids the company of other people.

noun. One who is alone, lacking or avoiding the company of others.

noun. a person who avoids the company or assistance of others

"I don't know that a loner is anymore likely to make a good leader than somebody who grew up with ten brothers and sisters to manage."

Stoner  boner  donor  honer  kroner  

Stones  asocial  gillnetter  maverick  misfit  

liner  

Diogenes  Hieronymian  Hieronymite  Timon of Athens  alien