shock, surprise, terror, and forlornness
simple, hearty, joyous, and affectionate
sin, injustice, grievance, and crime
skill, courage, prowess, and attractiveness
sleepy, soporific, sluggish, and dull [soporific = induces sleep]
slim, slender, slight, and scraggy
slow, dilatory, slack, and procrastinating [dilatory = postpone]
solemn, profound, serious, and difficult
solicit, urge, implore, and importune [importune = insistent requests]
sorrow, disaster, unhappiness, and bereavement