Synonyms for Fictive (same or very similar meaning)
WordNet sense 1 (adopted in order to deceive):
assumed, fictitious, sham, false, pretended, put onWordNet sense 2 (not genuine; imitating something superior):
counterfeit, imitativeWordNet sense 3 (having the ability or power to create):
creative, originativeFrom the ODE community, based on WordNetadd/edit