Relativize is a term used to describe the process of putting something into a relative perspective. If you're looking for alternative words to help convey the same idea, you might consider using synonyms like contextualize, qualify, or rationalize. These words all point to the idea of framing something within a larger framework to help give it meaning or to help better understand it within the context of a broader set of circumstances. Other possible synonyms might include terms like moderate, temper or mitigate, which all deal with the idea of toning down or softening the impact of something to help it fit more comfortably within a given set of circumstances.