pyrexia vs febrility

pyrexia and febrility both are nouns.

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

As nouns, pyrexia and febrility are synonyms defined as:

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

Other synonyms of pyrexia include febricity, fever, feverishness.

pyrexia (noun)	febrility (noun)
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