public toilet vs facility

public toilet and facility both are nouns.

Word	Noun	Adjective	Verb	Adverb
public toilet	Yes	No	No	No
facility	Yes	No	No	No

As nouns, facility is a hypernym of public toilet; that is, facility is a word with a broader meaning than public toilet:

public toilet: a toilet that is available to the public
facility: something designed and created to serve a particular function and to afford a particular convenience or service

Other hypernyms of public toilet include bathroom, can, john, lav, lavatory, privy, toilet.

public toilet (noun)	facility (noun)
a toilet that is available to the public	a service that an organization or a piece of equipment offers you
	something designed and created to serve a particular function and to afford a particular convenience or service
	a building or place that provides a particular service or is used for a particular industry
	a natural effortlessness
	skillful performance or ability without difficulty