The phrase "without emotion" is used to describe a lack of feeling or expression in a given situation or person. Synonyms for this phrase could include words such as detached, unfeeling, indifferent, expressionless, impassive, stoic, or unemotional. These words all convey a sense of emotional distance or aloofness, and can be used interchangeably with "without emotion" in many cases. Other similar expressions might include "emotionally numb," "cold-hearted," "unresponsive," "disinterested," or "unmoved." Depending on the context in which the phrase is being used, any of these synonyms could be appropriate to use in place of "without emotion".