mania vs frenzy

mania and frenzy both are nouns.

Word	Noun	Adjective	Verb	Adverb
mania	Yes	No	No	No
frenzy	Yes	No	No	No

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

mania: a mood disorder; an affective disorder in which the victim tends to respond excessively and sometimes violently
frenzy: state of violent mental agitation

Other hyponyms of mania include craze, delirium, fury, hysteria.

mania (noun)	frenzy (noun)
an irrational but irresistible motive for a belief or action	state of violent mental agitation
a mood disorder; an affective disorder in which the victim tends to respond excessively and sometimes violently