Here's what rhymes with contrivances.

Consider these alternatives

melodramatic / dramatic cliched / made formulaic / archaic convolutions / institutions improbabilities / abilities conceits / needs machinations / relations trite / right incongruities / duties anachronisms / conditions implausibility / stability implausible / plausible preachy / treaty devious / previous simplifications / relations saccharine / line stagey / baby superficiality / personality