Homonyms are words that are written in the feminine and masculine in the same way, but they have different meanings.

El cabeza (head – boss) – la cabeza (head – body)
El capital (money) – la capital (capital – city)
El clave (chord) – la clave (solution)
El cólera (cholera) – la cólera (anger)
El cometa (comet) – la cometa (kite)
El corte (cut) – la corte (royal court)
El cura (priest) – la cura (cure)
El frente (front) – la frente (forehead)
El guía (guide – person) – la guía (guide – book)
El margen (limit) – la margen (river bank)
El orden (order, rank) – la orden (order, request)
El policía (policeman) – la policía (the police – organization)
El trompeta (trumpet player) – la trompeta (trumpet – instrument)

Nos vemos prontito.