In Spanish you have certain words with different meaning depend on the genre. Some examples:

"El mañana" is, in a poetic way, the future.

"La mañana" is the morning.

"El rosa" is a colour.

"La rosa" is a flower. It could be rose or not. Red and white are more common.

"El naranja" is a colour again.

"La naranja" is a fruit. The orange tree is called "naranjo"

"El cura" is a catholic priest.

"La cura" is the healed of an injury.

"El coma" is when a person is like sleeping because an illness or and accident.

"La coma" is a sign of punctuation.

"El disco" is something round and flat. It could be a DVD.

"La disco" is the sort for "discoteca" a place where you go dancing.

"El capital" is the money of a person, company or country.

"La capital" is the main city of a country or region.

I'll be glad if you correct my mistakes in English.

Don't hesitate to ask any question.