The phrase "blow kingdom come" is an idiom that means to completely destroy something or someone. Antonyms for this phrase could include "protect," "preserve," "create," or "build." By using these words, we suggest the opposite of destruction and instead convey the idea of safeguarding, sustaining, producing, or constructing. For example, one could say "We need to protect this delicate ecosystem, not blow it kingdom come," or "We should work together to build a better future, rather than blowing it kingdom come with our disagreements." Antonyms for "blow kingdom come" remind us of the importance of positive action and preserving what we value most.