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"Suerte" is a noun which is often translated as "luck", and "azar" is a noun which is often translated as "chance". Learn more about the difference between "suerte" and "azar" below.
la suerte()
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
el azar()
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).