Here's what rhymes with illustrative.

Consider these alternatives

instructive / destructive illustrate / late juxtaposition / position paradigmatic / dramatic quotations / relations imitative / native edifying / dying allegories / stories impressionistic / characteristic untypical / critical summarizes / enterprises recreations / relations revelatory / story propagandistic / characteristic illustrations / relations iconographic / traffic utilitarian / agrarian amusing / using idiosyncratic / democratic epigraph / half summarize / size informative / formative illustrates / states continuations / relations