The word "disseminative" means to spread or distribute widely. Therefore, some antonyms for the word could include "concentrated," "contained," "restrained," or "restricted." These words imply a sense of confinement or limitation, rather than a widespread dispersion. Other antonyms for "disseminative" might be "compartmentalized," "localized," or "isolated," which all suggest a certain degree of separation or segregation between things. In general, antonyms for "disseminative" imply a sense of drawing together or consolidating, rather than spreading out, scattering, or diffusing.