🟨 Yellow — Easiest
CONTAINERS FOR SHIPPING
BOX, ENVELOPE, MAILER, TUBE
🟩 Green
UNMOVING
CONSTANT, STATIC, STATIONARY, STILL
🟦 Blue
MECHANICAL WATCH PARTS
GEAR, PAWL, RATCHET, SPRING
🟪 Purple — Hardest
DOGS WITH FIRST LETTER CHANGED
DUSKY, NOODLE, PERRIER, SOXER