The phrase "like a lamb" typically refers to a person who is calm, gentle, or meek. Synonyms for this expression include "docile," "mild-mannered," "submissive," "pliant," "yielding," "tame," "subdued," "quiet," and "unassertive." These words all convey a sense of peacefulness, restraint, and humility. They describe individuals who are not prone to violence, aggression, or disobedience. Using synonyms can help to add variety and depth to your writing, while also highlighting different aspects of a character's personality or demeanor. By experimenting with different word choices, you can enrich your descriptions and create more vivid, memorable prose.