bathroom vs john

bathroom and john both are nouns.

Word	Noun	Adjective	Verb	Adverb
bathroom	Yes	No	No	No
john	Yes	No	No	No

As nouns, bathroom and john are synonyms defined as:

Other synonyms of bathroom include can, lav, lavatory, privy, toilet.

bathroom (noun)	john (noun)
a room (as in a residence) containing a bathtub or shower and usually a washbasin and toilet	a room or building equipped with one or more toilets
a room or building equipped with one or more toilets	a prostitute's customer