"Reckon with" is a versatile phrase that can convey several meanings depending on the context. Some synonyms for reckoning with that imply consideration or attention include taking into account, taking seriously, and acknowledging. In situations where reckoning with involves reckoning up or evaluating a situation, synonyms for reckoning with could be analyzing, assessing, and evaluating. For reckoning with circumstances that require preparation and vigilance, synonyms might include preparing for, anticipating, and guarding against. Finally, reckon with can also denote confronting or dealing with someone, such as in a disagreement or conflict. Some synonyms for this interpretation include facing, addressing, and engaging. The precise synonyms to use depend on the intention and nuance of the phrase in each particular instance.