Promptlier is an adverb that means to act or respond quickly. There are a number of synonyms for this word, including speedily, swiftly, promptly, quickly, hastily, expeditiously, briskly, rapidly, immediately, and instantly. All of these words convey a sense of urgency and efficiency, and can be used interchangeably depending on the context and tone of the sentence. When describing a situation that requires immediate attention, using one of these synonyms for promptlier can help convey a sense of urgency and decisiveness. Whether you are writing an urgent business email, a time-sensitive report, or a letter to a friend, choosing the right synonyms can help you communicate your message more effectively.