realización

Etymology
From.

Noun

 * 1) realization, actualization process of making something real, act of becoming real or concrete
 * 2) implementation, conducting, carrying out, execution e.g. of a project or of measures
 * 3) completion, fulfillment, achievement
 * 4) making e.g. making of a purchase, a flight, a trip, a visit
 * 5)  performance

Usage notes

 * Realización is a false friend, and does not mean "realization" in the sense of sudden understanding. The word for this kind of "realization" in Spanish is comprensión.