Level 1. SIN, SINAI
Level 2. HARSH, RASH, ASH
Level 3. LOOM, BOOM, BLOOM, MOB
Level 4. SAG, LAG, GAS, GLASS, ASS
Level 5. WAR, ROW, RAW, ARROW, ROAR
Level 6. OLD, BOND, BOLD, BLOND, NOD
Level 7. TEN, TEE, NET, TENT, TEEN, TENET
Level 8. SEA, HAM, ASH, SAME, SHAME, MASH