When it comes to words and their meanings, there are always a variety of different ways to say the same thing. This is particularly true with regard to the word "reacting." Some synonyms for this word include responding, answering, returning, acknowledging, and replying. Each of these words has a slightly different connotation, but they all essentially mean the same thing - reacting to something in some way. Whether you're looking to expand your vocabulary, or simply trying to better understand the nuances of language, learning synonyms like these can be a useful exercise.