After a team scores a touchdown, they can earn additional points on an untimed down called the try. After a touchdown is scored, teams can earn one or two additional points. This is called the PAT or try.
Extra point - worth 1 point
2 point conversion - worth 2 points
Football Extra Points
Football 2 Point Conversion
The 2 point conversion requires the team to carry or catch the ball in the opposing team's end zone. Teams start on the opponent's 2nd yard line. The 2 point conversion involves an entire team's effort for it to run smoothly.
No one calls it a try in football. This term is only used in the rulebook. Everyone calls the try the extra point or the 2 point conversion.