The word "zappers" usually describes devices that quickly and efficiently eliminate unwanted pests such as mosquitoes, flies, and other insects. If we talk about antonyms of "zappers," then we should look for words that do the opposite. In this context, some antonyms for "zappers" could be words like "protectors," "defenders," or "preservers." These antonyms suggest that instead of eliminating unwanted insects, these devices protect and preserve them. Other antonyms of "zappers" could be "attractors" or "lures" as these devices attract insects rather than repelling or killing them. So, depending on the context, there could be several antonyms for the word "zappers.