Nervous excitement is a state of heightened emotion and physical arousal. It can be caused by a variety of factors, such as anticipation or fear. The crossword solutions for this term are SWIVET (6 letters), TREMOR (6 letters), and FEVER (5 letters). SWIVET is a state of agitation or excitement, often caused by surprise or alarm. TREMOR is an involuntary shaking or trembling of the body, usually caused by anxiety or fear. FEVER is an abnormally high body temperature, which can be caused by stress or excitement.