"More trumped-up" refers to something that is falsely or artificially created, exaggerated, or fabricated. Its antonyms could be "authentic," "genuine," "real," "honest," "truthful," "accurate," or "actual." These words suggest qualities that are based on facts, reality, and honesty. "Natural," "spontaneous," "unrehearsed," "sincere," and "legitimate" can also be antonyms for "more trumped-up," as they indicate something that isn't pretentious, staged, or forced. When something is "more trumped-up," it often lacks credibility and creates a sense of distrust. Its antonyms, on the other hand, have positive connotations that convey trust, reliability, and genuineness.