Magnetics rhymes with:
intermagnetics, intermagnetics, cognetics, intermagnetics, agrigenetics, bionetics, cadnetix, cognetics, dianetics, genetics, helionetics, intermagnetics, kinetics, pharmakinetics, phonetics
Magnetics sounds like:
macintax, macintosh, macintosh's, macintoshes, mackintosh, magnates, magnet's, magnetek, magnetic, magnets, magnitudes, management's, managements, managements', mankind's, mankinds, massenet's, mccants, mcintosh, mismatch, mismatches, monsanto's