ague vs chills and fever

ague and chills and fever both are nouns.

Word	Noun	Adjective	Verb	Adverb
ague	Yes	No	No	No
chills and fever	Yes	No	No	No

As nouns, ague and chills and fever are synonyms defined as:

ague and chills and fever: successive stages of chills and fever that is a symptom of malaria

ague (noun)	chills and fever (noun)
a mark placed above a vowel to indicate pronunciation	successive stages of chills and fever that is a symptom of malaria
a fit of shivering or shaking
successive stages of chills and fever that is a symptom of malaria