The word "subsidizer" refers to someone or something that provides financial support or assistance to another individual, organization or entity. Antonyms, on the other hand, are words that have opposite meanings to the given word. Therefore, antonyms of the word "subsidizer" could be "opposer," "critic," "foe," "enemy," or "detractor." These words denote those who are against providing financial support or assistance to others. Other antonyms of "subsidizer" include "disinterested," "uninvolved," "indifferent," "detached," or "impartial," meaning someone who lacks interest or concern for providing financial support or assistance.