accent vs acute accent

accent and acute accent both are nouns.

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

As nouns, acute accent is a hyponym of accent; that is, acute accent is a word with a more specific, narrower meaning than accent:

accent: a diacritical mark used to indicate stress or placed above a vowel to indicate a special pronunciation
acute accent: a mark placed above a vowel to indicate pronunciation

Other hyponyms of accent include stress mark, acute, ague, grave, grave accent, double acute accent, Hungarumlaut.

accent (noun)	acute accent (noun)
the relative prominence of a syllable or musical note (especially with regard to stress or pitch)	a mark placed above a vowel to indicate pronunciation
distinctive manner of oral expression
a diacritical mark used to indicate stress or placed above a vowel to indicate a special pronunciation
the usage or vocabulary that is characteristic of a specific group of people
special importance or significance

accent (verb)	acute accent (verb)
put stress on; utter with an accent
to stress, single out as important