panegyrist vs public speaker

panegyrist and public speaker both are nouns.

Word	Noun	Adjective	Verb	Adverb
panegyrist	Yes	No	No	No
public speaker	Yes	No	No	No

As nouns, public speaker is a hypernym of panegyrist; that is, public speaker is a word with a broader meaning than panegyrist:

Other hypernyms of panegyrist include orator, rhetorician, speechifier, speechmaker.

panegyrist (noun)	public speaker (noun)
an orator who delivers eulogies or panegyrics	a person who delivers a speech or oration