"Interposure" can be defined as the act of exposing or the state of being exposed to something. Some synonyms for this word include "exposure," "vulnerability," "openness," and "susceptibility." Another similar word is "imposition," which refers to the act of imposing or forcing something onto someone else. Other possible synonyms for "interposure" might include "accessibility," "exposition," "unmasking," or "revelation." Ultimately, the choice of synonym will depend on the context in which the word is being used and the specific connotations that the writer wants to convey.