Side-Line was created in 1989.
Sideline Ho was created in 2006.
Don Nehlen's Tales from the West Virginia Sideline was created in 2005.
a cry from the sideline
sideline/touchline
Line of Scrimmage
160 from sideline to sideline and 300 from inzone to inzone
Sideline Confessions - 2013 was released on: USA: 2013
Yes, "sideline" is a compound word made up of "side" and "line".
guideline
Mickey's Sideline - 1931 was released on: USA: 26 December 1931
Touch line to touch line the pitch must NOT exceed 70 metres
sideline