public convenience vs convenience

public convenience and convenience both are nouns.

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

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

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

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

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