Webster hit seven shots from 3-point territory for the Wizards, who fired in 66.7 percent of their field goal tries en route to the one-sided victory.
Phoenix got 21 points off the bench from Michael Beasley but it wasn't enough to prevent a fourth straight loss.
Jared Dudley contributed 16 points for the Suns.
Wisconsin business offering 'therapeutic cuddling' forced to close
Video of Victoria’s Secret models trying to 'twerk' hits Instagram