The word "inconvenientness" refers to the state of being inconvenient or causing trouble. There are a number of synonyms that can be used in place of this word, depending on the context and tone of the sentence. Some alternatives include awkwardness, discomfort, difficulty, bother, nuisance, hassle, irritation, annoyance, challenge, and disruption. Each of these words can convey a slightly different nuance or connotation, so it's important to choose the most appropriate word for the situation at hand. For example, "awkwardness" might be used to describe a social situation that feels uncomfortable, while "disruption" might be used to describe a schedule that has been thrown off track.