The phrase "stopped dead" means to come to an abrupt halt. There are several synonyms available for this phrase, such as "halted abruptly," "suddenly stopped," "ceased abruptly," "ground to a halt," "brought to a standstill," "jerked to a stop," "abruptly arrested," "crashed to a stop," "abruptly terminated," and "stopped short." These synonyms convey the same idea of coming to a sudden and complete stop. Depending on the context, some of these synonyms may be more appropriate to use than others, but all can be used interchangeably to describe an abrupt halt.