john vs bathroom

john and bathroom both are nouns.

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

As nouns, john and bathroom are synonyms defined as:

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

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