QUICK ANSWER
"Restroom" is a noun which is often translated as "el baño", and "WC" is an abbreviation which is often translated as "WC". Learn more about the difference between "restroom" and "WC" below.
restroom(
rehs
-
trum
)A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
b. el servicio (M)
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
This restaurant has the cleanest restrooms in the entire city.Este restaurante tiene los servicios más limpios de toda la ciudad.
d. el escusado (M)
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
The restroom on the third floor is out of order.El escusado del tercer piso no funciona.
WC(
duh
-
buhl
-
yu
-
si
)An abbreviation is the shortened form of a word or group of words (e.g., "UFO" = "unidentified flying object"; "p." = "page").
c. el servicio (M)
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
The WCs are at the end of the corridor.Los servicios están al final del pasillo.
d. el váter (M) (Spain)
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
Regionalism used in Spain
All the WCs were occupied, and there was a queue.Todos los váteres estaban ocupados, y había cola.
A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
b. el inodoro (M)
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
He threw his cigarette butt into the WC.Tiró la colilla por el inodoro.
c. el váter (M) (Spain)
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
Regionalism used in Spain
There's a cloakroom downstairs with a WC and washbasin.Abajo hay un baño de visitas con váter y lavamanos.