The phrase "hold pen" can be substituted or expanded using a variety of synonyms to convey similar meanings. Some possible options include grip pen, clutch pen, grasp pen, clasp pen, hold onto pen, retain pen, and secure pen. Each of these synonyms provides a slightly different connotation or emphasis, but all suggest a similar concept of physically and intentionally grasping a pen. Using synonyms can help add variety and nuance to writing, making it more engaging and precise. Additionally, exploring synonyms can sometimes reveal alternative word choices that better fit the tone or context of a piece of writing.