fever vs febrility

fever and febrility both are nouns.

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

As nouns, fever and febrility are synonyms defined as:

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

Other synonyms of fever include febricity, feverishness, pyrexia.

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