vertical
The term "sideways" is one word, and it can be an adverb, when it modifies a verb to tell in what direction an action is made. It would be considered an adjective when used before a noun, e.g. sideways motion.
capsize
dangeroushazardousominousperilousprecariousriskyunsafe
Counter-clockwise
It does not go sideways!
can you walk sideways
You can make the view sideways by putting the Game Camera sideways on something.
He parked his car sideways in the crowded parking lot.
move the cyclic sideways
No, sideways is not a comparative form of an adjective.
It is automatically played sideways...
The Sideways Door was created in 2006.
South of Sideways was created in 2003.
Sideways was released on 10/22/2004.
The Production Budget for Sideways was $17,000,000.
A sideways pass is called a lateral.