Networks' rhymes with:
network's, networks, network's, networks, artworks, network's, networks, artworks, dreamworks, dreamworks', fireworks, iwerks, masterworks, network's, networks, patchworks, steelworks, toolworks, voiceworks, waterworks
Networks' sounds like:
nader's, nature's, natures, nethers, network, network's, networks, nitric, nitrous, notorious