The antonyms for the word "not including" are inclusive, encompassing, incorporating, counting, comprising, and involving. These words suggest that something is part of a larger whole, rather than being excluded or left out. They convey a sense of completeness or wholeness, and imply that all relevant elements have been considered or accounted for. Using these antonyms can help to make your writing more precise and accurate, as well as convey a more positive or inclusive tone. Whether you're writing an academic paper, a business proposal, or a personal essay, it's important to choose your words carefully and accurately to convey your intended meaning.