When it comes to finding synonyms for the phrase "based on truth", there are plenty of options to consider. For instance, one could describe something as being "factual", "reliable", "genuine", or "authentic". Other possible synonyms could include "truthful", "bona fide", "veracious", or "accurate". Of course, these words could also vary in connotation and level of specificity. For example, "factual" and "accurate" might be more directly tied to objective information, while "authentic" and "genuine" could focus more on the sincerity of a statement or account. Ultimately, choosing the right synonym for "based on truth" will depend on the context and intended meaning.