CDOYTUS
Make words with S
Never: plural or third-person -S suffix
COCCUS COST COSY COUSCOUS CUSS CUSTODY CYST DUDS DUST DUSTY OOCYST OUST SCOOT SCOUT SCUD SCUT SODDY SOOT SOOTY STOOD STOUT STUCCO STUD STUDY SUCCUS SUDS SUDSY SUSS TOOTSY TOSS OUTSTOOD
Pangrams: CUSTODY