excitement vs fever

excitement and fever both are nouns.

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

As nouns, fever is a hyponym of excitement; that is, fever is a word with a more specific, narrower meaning than excitement:

Other hyponyms of excitement include fever pitch, sensation, feverishness.

excitement (noun)	fever (noun)
something that agitates and arouses	a state of nervous excitement
disturbance usually in protest	a rise in the temperature of the body; frequently a symptom of infection
the feeling of lively and cheerful joy
the state of being emotionally aroused and worked up