emphasize vs accent

emphasize is not a noun while accent is a noun.

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

As verbs, emphasize and accent are synonyms defined as:

Other synonyms of emphasize include accentuate, emphasise, punctuate, stress.

As verbs, accent is a hypernym of emphasize; that is, accent is a word with a broader meaning than emphasize:

Other hypernyms of emphasize include accentuate, emphasise, emphasize, punctuate, stress.

emphasize (noun)	accent (noun)
	the relative prominence of a syllable or musical note (especially with regard to stress or pitch)
	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

emphasize (verb)	accent (verb)
to stress, single out as important	put stress on; utter with an accent
give extra weight to (a communication)	to stress, single out as important