disputation vs public speaking

disputation and public speaking both are nouns.

Word	Noun	Adjective	Verb	Adverb
disputation	Yes	No	No	No
public speaking	Yes	No	No	No

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

disputation: the formal presentation of a stated proposition and the opposition to it (usually followed by a vote)
public speaking: delivering an address to a public audience

Other hypernyms of disputation include oral presentation, speaking, speechmaking.

disputation (noun)	public speaking (noun)
the formal presentation of a stated proposition and the opposition to it (usually followed by a vote)	delivering an address to a public audience
a contentious speech act; a dispute where there is strong disagreement