Sultrily is an adjective that is used to describe something that is extremely hot and humid, or something that has a strong sexual appeal. Other words that can be used as synonyms for sultrily include seductively, alluringly, enticingly, sensually, and provocatively. These words all have a similar connotation to sultrily, and can be used interchangeably to create different kinds of imagery and moods for the reader. When used appropriately, words like sultrily and its synonyms can add a layer of complexity and depth to the language being used, making the writing more evocative and engaging.