The phrase "nothing is lacking for comfort" essentially means that everything is provided for and nothing is missing. Some synonyms for this phrase include "fully equipped," "plentifully provisioned," "abundantly furnished," "completely supplied," "no shortage of amenities," and "well-appointed." These synonyms all convey the same message that everything necessary for comfort and ease is readily available. Whether it be in regards to a luxurious hotel room or a well-stocked kitchen, the sentiment is the same - everything has been thought of and nothing has been left out. Using these synonyms can help you add variety to your writing and better convey the idea that everything is taken care of.