QUICK ANSWER
"Cerro" is a form of "cerro", a noun which is often translated as "hill". "Montaña" is a noun which is often translated as "mountain". Learn more about the difference between "montaña" and "cerro" below.
la montaña(
mohn
-
tah
-
nyah
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
1. (geography)
a. mountain
Escalaremos la montaña y acamparemos en la cima para despertar al amanecer.We will climb the mountain and camp at the summit to wake up at sunrise.
a. mountains
¿Qué provisiones debería comprar para acampar en la montaña?What supplies should I buy to camp in the mountains?
el cerro(
seh
-
rroh
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
1. (geography)
2. (colloquial) (pile) (Andes)
A word or phrase that is commonly used in conversational speech (e.g., skinny, grandma).