1) Procrastinate : delay/postponed
2) Indispensable/Imperative : important
3) Invincible : unbeatable
4) Reckon : think
5) Transpire : happen
6) Castigate : criticise
7) Optimist : hopeful
8) Pessimist : hopeless
9) Prolific : multitalented
10) Flair/Prowess : skills