When we experience the common cold, not all symptoms are mild and tolerable. Sometimes, a severe cold can cause discomfort and disrupt our daily routines. It could be a debilitating condition that makes it hard to breathe, swallow, and move around. A severe cold could also lead to sinusitis, bronchitis, or pneumonia. Synonyms for severe cold could range from chilly, icy, and frigid to blizzard-like, bone-chilling, and bitter. Other colloquial terms that come to mind are flu, cold fever, and upper respiratory infection. No matter how we choose to describe this condition, one thing is certain - rest, hydration, and proper care are key to a speedy recovery.