The term 'Oklahoman' is often associated with the term 'SOONER', which is a six-letter word. The term 'SOONER' is used to refer to settlers who entered the Unassigned Lands of Oklahoma before the official opening date of April 22, 1889. These settlers were known as 'Sooners' because they arrived SOONER than the designated time. The term 'Oklahoman' is used to refer to a person who is from the state of Oklahoma.