public speaking vs speechmaking

public speaking and speechmaking both are nouns.

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

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

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

Other synonyms of public speaking include oral presentation, speaking.

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