Rocketdyne rhymes with:
actodine, aerodyne, brisendine, celandine, ceradyne, compudyne, conradine, considine, dideoxycytidine, digidyne, envirodyne, gardyne, geodyne, healthdyne, heterodyne, interdyne, iodine, jardine, microdyne, oxidyne, paradyne, pepperdine, spectradyne, stanadyne, superheterodyne, technodyne, teledyne, teradyne, trimedyne, vandyne
Rocketdyne sounds like:
ragtime, reaction, recitation, recoton, rectum, rejection, requisition, restaino, restitution, reston, resuscitation, ricadonna, richstone, richton, rigatoni, rigdon, risden, risdon, riston, rosten, roston, roughton, royston, rushton, rustin, ruston