orator vs haranguer

orator and haranguer both are nouns.

Word	Noun	Adjective	Verb	Adverb
orator	Yes	No	No	No
haranguer	Yes	No	No	No

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

Other hyponyms of orator include eulogist, panegyrist, elocutionist, spellbinder, tub-thumper.

orator (noun)	haranguer (noun)
a person who delivers a speech or oration	a public speaker who delivers a loud or forceful or angry speech