Tamps, a verb that means to press or pack down, has several antonyms. One such antonym is "fluffs," which means to make something lighter or looser by shaking or puffing it up. Another antonym for tamps is "loosens," which means to make something less tight or compact by undoing or releasing it. Additionally, "uncompresses" can be used as an antonym for tamps, which means to release or decrease pressure on something that is compressed or packed down. Finally, "uncompacts" is another antonym for tamps, which means to undo or loosen something that is tightly packed or compressed.