When it comes to finding alternatives for the phrase "cozy up," there are several options to choose from. One possible synonym is "snuggle up," which suggests getting comfortable and warm in a cozy environment. "Nestle in" is another excellent alternative, conveying the idea of settling into a comfortable position in a warm, inviting space. Adding a layer of intimacy, "cuddle up" is often used when referring to close physical contact with another person or pet. "Huddle together" is a great phrase to use when people gather in a small space to stay warm or discuss something privately. Finally, "cosset" denotes the act of pampering or treating someone with great care and affection, which can make them feel warm and cozy.