Synonyms for Interactive (same or very similar meaning)
WordNet sense 1 (capable of acting on or influencing each other):
interactionalWordNet sense 2 (concerning each of two or more persons or things; especially given or done in return):
reciprocalWordNet sense 3 (used especially of drugs or muscles that work together so the total effect is greater than the sum of the two (or more)):
synergisticFrom the ODE community, based on WordNetadd/edit