convenience vs public convenience

convenience and public convenience both are nouns.

Word	Noun	Adjective	Verb	Adverb
convenience	Yes	No	No	No
public convenience	Yes	No	No	No

As nouns, convenience and public convenience are synonyms defined as:

convenience and public convenience: a toilet that is available to the public

Other synonyms of convenience include comfort station, public lavatory, public toilet, restroom, toilet facility, wash room.

convenience (noun)	public convenience (noun)
a device or control that is very useful for a particular job	a toilet that is available to the public
a toilet that is available to the public
the quality of being useful and convenient
the state of being suitable or opportune