The phrase "are hard up" means to be in a financially difficult situation. Some antonyms for this phrase could include "financially secure," "wealthy," "affluent," "well-off," or "flush." These words indicate a state of financial stability or abundance, as opposed to experiencing financial hardship. Other antonyms for "are hard up" might include "comfortable," "prosperous," "content," or "successful." These words suggest a level of ease and satisfaction in one's financial situation. Overall, the antonyms for "are hard up" depict a state of financial well-being and prosperity, as opposed to a state of financial difficulty and struggle.