Here's what rhymes with backwaters.

Consider these alternatives

estuaries / varies wallowing / following bayous / curyous teeming / meaning waterfalls / force hinterland / land wadis / native oases / navies byways / highways waterways / ways vegetated / stated shallows / arrows ravines / means underpopulated / overpopulated streams / seems stodgy / body untamed / change watercourses / forces netherworld / world