Level 1. HAND - ANSWER - STUDENT - QUESTION
Level 2. COPIER - CALL - OFFICE - ASSISTANT
Level 3. NOTEBOOK - INK - STATIONARY - NOTE
Level 4. HAMBURGER - ROLL - CHEESE - PICKLE
Level 5. HONEYCOMB - BEE - NEST - POLLINATE
Level 6. CAFFEINE - MUG - AWAKE - PERCOLATE
Level 7. DUCKLING - KITTEN - PUP - CALF - BABY
Level 8. TUMBLE - TRIP - DOWN - FALL - DESCEND
Level 9. PACKED - EMPTY - BRIMMING - VACANT
Level 10. LEMONADE - DRINK - WATER - THIRSTY
Level 11. FASHION - RUNWAY - DESIGN - SKETCH
Level 12. AMBULANCE - SIREN - QUICK - URGENT
Level 13. TOMORROW - TODAY - DATE - CALENDAR
Level 14. LEADER - CHAIR - CHIEF - PRESIDENT
Level 15. CLAW - HAIRBALL - WHISKER - FELINE
Level 16. LOST - JOURNEY - DIRECTION - ROUTE
Level 17. MELT - CRUMBLE - SHATTER - DESTROY
Level 18. EXTINCTION - DINOSAUR - CAVEMAN
Level 19. UMBRELLA - DRY - DOWNPOUR - SOAKED
Level 20. YAWN - NAP - FATIGUE - SLEEP - SNOOZE
