ague vs acute accent

ague and acute accent both are nouns.

Word	Noun	Adjective	Verb	Adverb
ague	Yes	No	No	No
acute accent	Yes	No	No	No

As nouns, ague and acute accent are synonyms defined as:

ague and acute accent: a mark placed above a vowel to indicate pronunciation

Other synonyms of ague include acute.

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