According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 41 words with the pattern SU----S-. That is, eight letter words with 1st letter S and 2nd letter U and 7th letter S. In alphabetical order, they are:

subcause

subclass

subcrust

suberise

suberose

subitise

sublease

submerse

subphase

subsense

subtense

subtlest

subtrist

subverse

subverst

suchness

suchwise

suckfish

suckiest

suckless

sudsiest

sudsless

suetiest

suitcase

suitress

sulkiest

sumphish

sunburst

sundress

sunglass

sunniest

supplest

suppress

surcease

sureness

surffish

surfiest

surgiest

surliest

surprise

suspense