The antonyms for the phrase "changed position" are "stayed put," "remained stationary," "maintained the same position," "standstill," or "static." These words imply that an object, person or thing has not moved from its original place. Conversely, synonyms for the phrase "changed position" include "shifted," "relocated," "moved," "transferred," or "switched," which indicates that something has been altered or moved from one location to another. It's vital to have a good understanding of antonyms and synonyms since they aid us to polish our communication skills and express our ideas concisely and accurately.