Chris Goode's fourth try in as many games with the last play of the game brought Manor Park back to 36-17 following Chris Morewood's lovely break to score under the posts.
But the damage was done in the first half as Woodrush ran home four tries before Callum Ross struck for the visitors struck back for Park.
However, the hosts found time for one further score to build a half-time lead they were never likely to relinquish.
"The better team on the day won, so credit must go to Woodrush first and foremost," said coach Nick Bishop.
"But we showed during spells of the game we could get them on the back foot and we had a good day at the setpiece, although we perhaps didn't get the reward we deserved from that."
Wins over Stoke Old Boys and Upton have been countered by defeats to Shipston, Pinley and Woodrush as Park sit in a mid-table position of seventh. Their nearest rivals Alcester are their next opponents at the Griff and Coton on Saturday.
"It's been a pretty unrelenting start to the season," said Bishop. "There's been some real high points but some frustrations too. We're not a million miles away and the key thing is we're scoring tries, which isn't something that has always been there for us.
"In every game we've scored at least two tries and we've averaged four tries per game. We've just got to be a bit more streetwise on the other side of the ball."