Rocketry rhymes with:
basketry, circuitry, altimetry, asymmetry, banditry, basketry, bigotry, cabinetry, circuitry, dissymmetry, gadgetry, geometry, helotry, idolatry, optometry, poetry, psychiatry, punditry, puppetry, spectrometry, symmetry, telemetry, toiletry, zealotry
Rocketry sounds like:
racketeer, rakestraw, raster, rastetter, raxter, reactor, rector, rectory, regester, register, registrar, registry, reister, requester, resetar, rester, restore, restorer, richter, riester, riesterer, righter, rister, roaster, rochester, roister, rooster, rossiter, roster, royster, rustier