Reactor rhymes with:
actor, akhtar, compactor, detractor, factor, lacter, pachter, refractor, schachter, schlachter, tractor
Reactor sounds like:
racketeer, rakestraw, raster, rastetter, raxter, rector, rectory, regester, register, registrar, registry, reister, requester, resetar, rester, restore, restorer, richter, riester, riesterer, righter, rister, roaster, rochester, rocketry, roister, rooster, rossiter, roster, royster, rustier