The word "irrealizable" means impossible or not achievable. Its antonyms are words which denote the opposite meaning, that is, something achievable or possible. Some of the antonyms for "irrealizable" include: achievable, attainable, doable, feasible, possible, realizable, solvable, and workable. These words describe a state or situation that can be accomplished or achieved. For example, "achievable goal" refers to a goal that one can realistically reach or accomplish, whereas "irrealizable goal" would be something unattainable. In conclusion, antonyms of "irrealizable" represent positive and optimistic qualities that encourage individuals to pursue their goals and dreams with confidence.