The Magpies conceded late on the lose 2-1 to the Black Cats in the Tyne-Wear derby two weeks ago, but have since recorded surprise victories over Chelsea and Tottenham.
Williamson has been delighted with Newcastle's response to their derby defeat, especially their defensive resolve, which has seen the club move up to ninth place in the league.
|9/1||Newcastle are 9/1 with BetVictor to beat Norwich 2-0|
"It's a reaction. The supporters were obviously upset by it and, I can't speak for anyone else, but for me it was one of the worst defeats of my career.
"I can't stand losing those games that mean so much. I hate it.
"It was then all about how we responded to it. In the cup against Manchester City we kept a clean sheet over 90 minutes, and then we went on to beat Chelsea and Tottenham.”
Newcastle were indebted to goalkeeper Tim Krul against Spurs on Sunday after the Dutchman made a string of fine saves, but Williamson claims it was anything but a one-man effort.
"You couldn't go to Tottenham and get anything unless it was a real team effort,” Williamson said.
"The lads were brilliant, we defended from the front and it was a great team win.
"We had to defend a lot but when you've got players like [Yoan] Gouffran, [Loic] Remy, Shola [Ameobi]
and Moussa [Sissoko] on the pitch you are always likely to nick a goal as well.
"Everyone was pulling in the same direction and we never lost sight of what we were trying to achieve."