"Subject to" is a phrase that denotes being affected or influenced by a particular circumstance. Synonyms for this phrase are plenty and can be used interchangeably. Some of the synonyms for subject to include susceptible, prone, at the mercy of, vulnerable, contingent, relying on, dependent, liable, and predisposed. These words all indicate a possible outcome based on circumstances or conditions. Some other synonyms include conditional, controlled by, influenced by, and bound to. These words all imply a level of control or dependency that must be considered when analyzing a particular situation. By using synonyms for "subject to," one can ensure that their writing is more precise and effective.