Ruinate is a 7 letter English word. It's valid Scrabble word worth 7 points. It's valid Words with friends word worth 9 points.
You can make 239 anagrams from letters in ruinate (aeinrtu).
1530-40; Medieval Latin ruīnātus, past participle of ruīnāre. See ruin, -ate1
The house, save for the actual fabric of it, had become rather dilapidated and ruinate.
So Theobald, in accordance with the rime, read for ruinate of the folio.