The antonyms for the phrase "passes up" can be different based on the context of use. In the sense of missing an opportunity or rejecting an option, the antonyms can be "accepts," "embraces," "seizes," "grabs," or "takes advantage of." Moreover, if we think of "passes up" as moving beyond or going over something, synonyms can include "crosses," "moves forward," "advances through," "surmounts," or "traverses." In the context of voting or decision-making, the antonyms for "passes up" can be "approves," "endorses," "favors," or "supports." Hence, choosing the appropriate antonyms for "passes up" depends upon the specific meaning and usage of the phrase.