5
1 faster, faster
2 more
3 worse
4 better
5 more/less carefully
6 better
7 easier
8 later
9 more/less frequently
10 earlier, quicker
11 least
12 best
13 harder
14 more slowly
15 better
6
1 interested
2 worried
3 bored
4 annoyed
5 tiring
6 excited
7 boring
8 surprising