Level 1. SEC, SEW, SCREW, CREW
Level 2. HOSE, SHOE, SHOT, THOSE, HOST
Level 3. DOSE, DOUSE, EXODUS, USED
Level 4. DEED, FEED, NEED, DEFEND, FEND
Level 5. RENT, RITE, INERT, INTER, INVERT, TINE
Level 6. EVIL, LITE, LIVE, TILE, VEIL, LEVITE, ELITE
Level 7. CENT, CINE, CITE, FINE, FEINT, INFECT, NICE
Level 8. ARID, FAIR, YARD, DAIRY, DIARY, FRIDAY, RAID
