Illomened is a word that signifies bad luck or a dark future. However, there are words that serve as antonyms to ill-omened, which can be considered as favorable or promising. The antonym for illomened could be propitious, which means being in favor of good fortune or prosperousness. Another antonym could be auspicious, indicating a bright or hopeful future. Additionally, the word serendipitous could also be considered an antonym for illomened, suggesting a fortuitous or beneficial event. Therefore, while illomened represents negative implications, propitious, auspicious and serendipitous could be used to describe positive or hopeful outcomes.