The phrase "is cold" can have several synonyms depending on the context or situation. These include terms such as chilly, frigid, icy, brisk, cool, and frosty. Each of these words highlights a particular aspect of coldness, such as low temperatures, harsh winds, or overall discomfort. However, it's essential to note the difference between the senses of these synonyms, as the context of the phrase can dictate the appropriate word to use. For example, frigid or icy might be used when describing outdoor weather conditions, while brisk or cool can refer to refreshing indoor environments. Ultimately, being aware of these synonyms can help add variety and nuance to one's vocabulary and writing style.