Hillsides rhymes with:
backsides, burnside's, downsides, fratricides, fungicides, genocides, glucosides, herbicides, homicides, infanticides, insecticides, ironsides, mountainsides, oxides, pesticides, roadsides, silversides, suicides, whitesides
backsides, burnside's, downsides, fratricides, fungicides, genocides, glucosides, herbicides, homicides, infanticides, insecticides, ironsides, mountainsides, oxides, pesticides, roadsides, silversides, suicides, whitesides