When it comes to antonyms for the word "disagreeing," one can think of a few different options. One obvious choice might be "agreeing," which is essentially the opposite of disagreeing. Another option might be "concurring," which implies that two parties are in complete agreement. Alternatively, "harmonizing" could be considered an antonym, as it describes two things that are in agreement with one another. Another possible antonym might be "accordant," which suggests that two things are in harmony or agreement with one another. Ultimately, the choice of antonyms for "disagreeing" will depend on the context in which the word is used and the specific meanings that the speaker is trying to convey.