straitlaced or straightlacedadj

• scantling
• scanty
• scape
• -scape
• scapegoat
• scapegrace
• scaphoid
• scapula
• scapular
• scapulary
• scar
• scarab
• scarabaeid
• Scaramouch
• scarce
• scarcely
• scare
• scarecrow
• scared
• scaredy-cat
• scaremonger
• scare tactics
• scare up
• scarf
• scarf joint