The word "indefinity" refers to the state of being undefined or uncertain. However, there are many more synonyms that can be used in place of this word, depending on the context of the sentence. Some possible synonyms for "indefinity" include ambiguity, obscurity, vagueness, haziness, uncertainty, and imprecision. These words all convey a sense of lacking a clear or defined meaning or identity. Other synonyms might include indeterminacy, indistinctness, or equivocality. Regardless of which synonym is used, the main idea is that something is unclear or not well-defined, and it can be difficult to understand or describe accurately.