"Keep snug" means to keep warm and comfortable in a cozy or snug place. Some synonyms for "keep snug" are "snuggle," "nestle," "cuddle," "hug," and "embracing." These words suggest a sense of comfort, peace, and security. Other synonyms include "cosy up," "bundle up," "wrap up," and "cover up." These words connote a sense of protection against cold weather and harsh conditions. Overall, these synonyms suggest a desire for warmth, comfort, and security. Whether it be through physical closeness or a cozy environment, the sentiment behind "keep snug" is universal and enduring.