accent vs Hungarumlaut

accent and Hungarumlaut both are nouns.

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

As nouns, Hungarumlaut is a hyponym of accent; that is, Hungarumlaut 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
Hungarumlaut: a diacritic mark of the Latin script, used primarily in written Hungarian.

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

accent (noun)	Hungarumlaut (noun)
the relative prominence of a syllable or musical note (especially with regard to stress or pitch)	a diacritic mark of the Latin script, used primarily in written Hungarian.
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)	Hungarumlaut (verb)
put stress on; utter with an accent
to stress, single out as important