"Ice shot" can be replaced with several synonyms, depending on its context and intended meaning. For instance, "ice cube" could be used as it refers to a small block of frozen water typically used to cool drinks. "Ice pellet" could be used to describe a soft, round bit of ice or snow which can fall from the sky.
If the term is being used to refer to an alcoholic drink, "frosty shot" or "chilled shot" could be used interchangeably with "ice shot". Similarly, if referring to a winter weather condition, "frosty blast" or "icy wind" could be used instead. It's important to choose the most accurate synonym that captures the intended message.