speechmaking vs public speaking

speechmaking and public speaking both are nouns.

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

As nouns, speechmaking and public speaking are synonyms defined as:

speechmaking and public speaking: delivering an address to a public audience

Other synonyms of speechmaking include oral presentation, speaking.

speechmaking (noun)	public speaking (noun)
delivering an address to a public audience	delivering an address to a public audience