febrility vs fever

febrility and fever both are nouns.

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

As nouns, febrility and fever are synonyms defined as:

febrility and fever: a rise in the temperature of the body; frequently a symptom of infection

Other synonyms of febrility include febricity, feverishness, pyrexia.

febrility (noun)	fever (noun)
a rise in the temperature of the body; frequently a symptom of infection	a state of nervous excitement
	a rise in the temperature of the body; frequently a symptom of infection