1) heavy
2) dangerous
3) big
4) ugly
5) slow
6) nice
7) comfortable
8) expensive
9) good
10) bad
11) little
12) many
13) weak​

heavy – heavier (than)dangerous – more dangerous (than)big – bigger (than)ugly – uglier (than)slow – slower (than)nice – nicer (than)comfortable – more comfortable (than)expensive – more expensive (than)good – better (than)bad – worse (than)little – less (than)many – more (than)weak – weaker (than)

Формы слов в Comparative