我去查了一下用法,cosy 是英国用法, 在加拿大, 两个都可以,
出版物, cozy 是通常用法,
In American English, cozy is the standard spelling of the word meaning, mainly, (1) comfortable and warm, and (2) to make oneself comfortable and warm.1 Outside North America the word is spelled cosy. Both spellings are used in Canada, though cozy is more common in published writing from this century.