how to describe quilt?
can i use warm?mildness?what else words are better than those?
A quilt is warm. But it's a concrete noun, so I don't see how it could be an abstract noun ('mildness'). And I don't know what you mean by 'better than'. A quilt can be thick/big/long/pink ... (pick your adjective!)
b
Cozy(AmE spelling), comfortable, soft?