post office vs poste restante

post office and poste restante both are nouns.

Word	Noun	Adjective	Verb	Adverb
post office	Yes	No	No	No
poste restante	Yes	No	No	No

post office (noun)	poste restante (noun)
a children's game in which kisses are exchanged for pretended letters	a notation written on mail that is to be held at the post office until called for (not in the United States or Canada)
a local branch where postal services are available	the part of a post office that handles mail for persons who call for it