When trying to express uncertainty or doubt in a statement, the phrase "or not exactly" can come in handy. However, there are plenty of synonyms that can replace this phrase and convey similar meanings. For instance, you may use "or so to speak" or "shall we say" as a way to add a tentative or hypothetical tone to your statement. "Maybe" and "perhaps" can also be good substitutes in many cases. Another option is to use "or something like that" or "or something along those lines" to indicate that the statement is not exact. Ultimately, the best synonym to use depends on the context and purpose of your statement.