general knowledge vs public knowledge

general knowledge and public knowledge both are nouns.

Word	Noun	Adjective	Verb	Adverb
general knowledge	Yes	No	No	No
public knowledge	Yes	No	No	No

As nouns, general knowledge and public knowledge are synonyms defined as:

general knowledge and public knowledge: knowledge that is available to anyone

general knowledge (noun)	public knowledge (noun)
knowledge that is available to anyone	knowledge that is available to anyone