accent mark vs acute

accent mark and acute both are nouns.

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

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

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

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

accent mark (noun)	acute (noun)
a diacritical mark used to indicate stress or placed above a vowel to indicate a special pronunciation	a mark placed above a vowel to indicate pronunciation

accent mark (adjective)	acute (adjective)
	having or experiencing a rapid onset and short but severe course
	of an angle; less than 90 degrees
	of critical importance and consequence
	having or demonstrating ability to recognize or draw fine distinctions
	ending in a sharp point
	extremely sharp or severe