The former United keeper admits he feared a flamethrower blast from Moyes more than the old hairdryer treatment from Sir Alex Ferguson.
Howard said: "No, Ferguson didn't scare me particularly but yeah, I did get yelled at in my time at United.
"Who's got the worst temper? Moyes is second to none. You never ever want him to get mad. He doesn't allow players to rest or slacken off.
"After seven years working with him you would have thought a guy like me, who he trusted, would have got a break. But no, he was still at me after all that time."