The Wizards also made 13 of 21 three-point attempts and shot 57 percent from the field overall.
Washington has won three straight, 10 of 11 overall and 19 of 20 at home and are an Eastern Conference-best 17-5 since New Years Day.
Westbrook scored 17 points for the Thunder, but the NBA Most Valuable Player candidate was a long way from his triple-double form.
It has been quite a week for Westbrook. Less than 48 hours after an emotional matchup against former his teammate, Golden State Warriors star Kevin Durant, he finished with four rebounds and four assists while shooting five of 19 from the field.
The road matchup against the Washington Wizards pitted all-star point guards Westbrook and Wall against each other.
It didn't garner the same amount of attention that came from Durant's first game in Oklahoma City since spurning the Thunder for the Western Conference champion Warriors.
But the same outcome means two losses in a row for the Thunder who fell to 31-25, shooting just 35.4 percent overall on Monday.