Bottlenecks rhymes with:
turtlenecks, turtlenecks, turtlenecks, annex, crownx, fanech's, finex, hyponex, methanex, nynex, rednecks, roughnecks, turtlenecks
Bottlenecks sounds like:
battalions, battling, beadling, bethlehem's, bottleneck, bottling, budlong