Inapplicabilities refers to things that are not relevant or not applicable to a given situation or context. Some synonyms for this word include irrelevance, inapplicability, incongruity, non-applicability, and impracticability. Other possible synonyms might include unsuitability, discrepancy, inappositeness, and futility. These words all suggest a lack of fit or suitability, whether that is because of a mismatch between two things or simply because something is unworkable or impractical in a given context. Ultimately, the choice of synonym will depend on the particular context in which the word is being used and the nuances of meaning that need to be conveyed.