Ответ:
- busy — busier — the busiest
- cool — cooler — the coolest
- friendly — friendlier — the friendliest
- heavy — heavier — the heaviest
- nice — nicer — the nicest
- noisy — noisier — the noisiest
- old — older — the oldest
- safe — safer — the safest
- small — smaller — the smallest
- wet — wetter — the wettest
