Mormons mor·mons US/ˈmɔrmʌnz/ uncommon noun 1. church founded by Joseph Smith in 1830 with headquarters in Salt Lake City, Utah SynonymsMormon ChurchChurch of Jesus Christ of Latter-day Saints Related words Broader terms Protestant denomination Part of Latter-day Saint WordNet 2.1 (Princeton University). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.