fever vs excitation

fever and excitation both are nouns.

Word	Noun	Adjective	Verb	Adverb
fever	Yes	No	No	No
excitation	Yes	No	No	No

As nouns, excitation is a hypernym of fever; that is, excitation is a word with a broader meaning than fever:

Other hypernyms of fever include excitement, fervor, fervour, inflammation.

fever (noun)	excitation (noun)
a state of nervous excitement	something that agitates and arouses
a rise in the temperature of the body; frequently a symptom of infection	the neural or electrical arousal of an organ or muscle or gland
	the state of being emotionally aroused and worked up