According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 8 words with the pattern -U---D-S-. That is, nine letter words with 2nd letter U and 6th letter D and 8th letter S. In alphabetical order, they are:
cursedest
durnedest
multidisc
putridest
ruggedest
ruggedise
subsidise
turgidest