Lie-abed is a term that refers to someone who enjoys staying in bed for long hours. However, there are several other terms and synonyms that can be used instead of Lie-abed, including "couch potato," "sluggard," "bed bug," "do-nothing," "lazybones," "sloth," "indolent," "idle person," "dormouse," "slugabed," and "pillow hugger." These words have their unique meanings and connotations, and they can be used interchangeably depending on the context of the sentence. However, they all refer to people who enjoy lying in bed for extended periods, and perhaps, are not very productive during the day.