Unit45
sigh sight sightseeing sign signal signature significance significant signify silence silent silicon silk silly silver similar simple simplicity simplify simply simulate simultaneous sin since sincere sing single singular sink sip sir siren sister sit site situated situation six size skate skeleton skeptical sketch ski skill skilled skillful skim skin skip skirt skull sky skyscraper slack slam slap slaughter slave sleep sleeve slender slice slide slight slim slip slipper slippery slit slogan slope slot slow slum sly small smart smash smell smile smog smoke smooth smuggle snack snake snap snatch sneak sneeze sniff snow snowstorm so soak soap soar sob sober so-called soccer sociable social
Unit46
socialism society sociology sock soda sofa soft software soil solar soldier sole solemn solid solidarity solitary solo soluble solution solve some somebody somehow someone something sometime sometimes somewhat somewhere son song soon sophisticated sophomore sore sorrow sorry sort soul sound soup sour source south southeast southern southwest sovereign sow space spacecraft spaceship spacious spade span spare spark sparkle speak speaker spear special specialist speciality specialize species specific specification specify specimen spectacle spectacular spectator spectrum speculate speech speed spell spelling spend sphere spicy spider spill spin spine spiral spirit spiritual spit spite splash splendid split spoil spokesman sponge sponsor spontaneous spoon sport
