The phrase "are cold" can be substituted with a myriad of synonyms, each with its unique connotation. One could use "are chilly," "are frigid," or "are gelid" to describe a particularly cold environment or temperature. Alternatively, colloquial phrases could be employed, such as "are freezing their butts off" or "are shivering from head to toe." Additionally, metaphors and idiomatic expressions can replace "are cold," like "are as cold as ice" or "are like a block of ice." Whatever the context, choosing the right synonym for "are cold" can elevate one's writing and speech.