excitation vs fever

excitation and fever both are nouns.

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

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

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

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