TensionA sense of suspense or anxiety
Definitions:
The state of being stretched tight.
Mental or emotional strain.
SuspenseA feeling of uncertainty and excitement
Definitions:
A state or feeling of excited or anxious uncertainty about what may happen.
OminousGiving the feeling that something bad will happen
Definitions:
Giving the impression that something bad or unpleasant is going to happen; threatening; inauspicious.
ForeshadowingA warning or indication of a future event
Definitions:
Be a warning or indication of (a future event).
ClimaxThe most intense or exciting part of something
Definitions:
The most intense, exciting, or important point of something; a culmination or apex.