WordNet sense 1 (a padded cloth covering to keep a teapot warm):

cozy, cosey, cozey, cozie, tea cosey, tea cosy, tea cozey, tea cozie, tea cozy

WordNet sense 2 (enjoying or affording comforting warmth and shelter especially in a small space):

snug

WordNet sense 3 (providing or experiencing physical well-being or relief (`comfy' is informal)):

comfortable, comfy