You can make 179 valid words from the letters in PREFABBED using the Scrabble US/CAN dictionary.
How many points is PREFABBED worth in Scrabble?
PREFABBED is worth 19 points in Scrabble (US/CAN) and 22 points in Words With Friends.
How do I use the Word Unscrambler tool?
Enter any letters into the input box and press Search. The tool will return every valid English word that can be made from those letters using the dictionary you select.