Here's what rhymes with boundaries.

Consider these alternatives

geographical / classical defined / find borders / orders territorial / editorial geographic / traffic within / been balls / course beyond / want redraw / law define / design constituencies / stituencies redrawn / long transcend / went dividing / providing demarcation / operation stretching / reading territory / story fours / force delineated / dated edge / said broad / thought areas / various divide / side transcended / prevented linguistic / characteristic delineate / late