The phrase "blew kingdom come" is an idiom that means to completely destroy something or to cause it to explode. The antonyms of this phrase are to build and to construct. Building and constructing involve creating something new or improving on existing structures, whereas the phrase "blew kingdom come" involves destruction and devastation. Other possible antonyms for this phrase include saving, preserving, and safeguarding, all of which involve protecting something and ensuring its continued existence. While the phrase "blew kingdom come" may be used figuratively to describe a situation that has gone disastrously wrong, its antonyms remind us of the importance of creating and protecting valuable structures and resources.