"Shifting one ground" is defined as altering one's position or viewpoint on a particular issue. This phrase can be replaced with a variety of synonyms to convey a similar meaning. For example, "changing one's stance," "modifying one's opinion," "revising one's perspective," or "adjusting one's standpoint." Each of these phrases implies a shift in one's perspective and an openness to considering new information or viewpoints. Additionally, using a variety of synonyms can help to avoid repetition in written or spoken language and can add nuance and complexity to communication.