Answer:
Paradigm
Other words for Nihilisilism would be Anarchy,Atheism and lawlessness
Other words for Trepidation would be Alarm,apprehension,Consternation,Dismay,Disquiet,Dread,Excitemeant, fright,horror,Jitters,Nevousness,Panic,Terror and uneasiness.
Other words for Epiphany would be Flash,Insight,inspiration,Oracle,Realization and vision.
And other words for Paradigm are Archetype,chart and criterion