Desayuno

Comida (it’s the same word used for “food”) o almuerzo (extremely formal, but used at hotels)

Cena

Aperitivos

Bebidas

Altough we tend to adapt our gastronomic schedule to our particular lifestyle, Spanish culture have five meals per day.
Desayuno (7:30 am)
Almuerzo (10:30 am)
Comida (2:30 pm)
Merienda (5:30 pm.)
Cena (9 pm)

More or less. It’s useful to note that we usually refeer to the second breakfast when we say “almuerzo”. Only in a very formal (or touristic) language we refeer to the main meal, normally called “comida”.