Words from
caper
a playful leap or skip.
Source: Sophie's World - Jostein Gaarder
dialectic
the art of investigating or discussing the truth of opinions.
Source: Sophie's World - Jostein Gaarder
viable
capable of working successfully; feasible.
Source: Sophie's World - Jostein Gaarder
interplay
the way in which two or more things have an effect on each other.
Source: Sophie's World - Jostein Gaarder