Porterages rhymes with:
brokerage's, brokerages, brokerages', stockbrokerages, acknowledges, advantages, appendages, arrearages, average's, averages, babbage's, beverages, blockages, brokerage's, brokerages, brokerages', cabbages, cardiges, carriages, claridges, college's, colleges, colleges', cottages, disadvantages, discourages, disparages, dosages, encourages, envisages, heritage's, hostages', lineages, linkages, manages, marriages, miscarriages, mortgage's, orphanages, outages, package's, partridges, percentages, pilgrimages, pillages, presages, ravages, repackages, sausages, stockbrokerages, stoppages, vantage's, vantages, vestiges, village's, vintages, voltage's, wantages
Porterages sounds like:
porter's, porters, portrays, predators, pretoria's, prothorax, puerto-rico