The term "more faddish" can be described as a trend or fashion that is popular for a short period of time. The antonyms for this term would be "timeless," "classic," or "evergreen," which conveys a sense of longevity and everlasting appeal. Other antonyms may include "unpopular," "outdated," or "obsolete," which suggests a lack of interest or relevance. In contrast, the term "sustainable" can also be used as an antonym for "more faddish," indicating an enduring and environmentally conscious trend. Ultimately, the choice of antonym depends on the context and message being conveyed with the word "more faddish.