Symtron rhymes with:
arbitron, distron, infotron, magnetron, neutron, positron, teletron, videotron, arbitron, betaseron, boron, dacron, distron, huron, infotron, magnetron, micron, moron, neutron, positron, teletron, videotron
Symtron sounds like:
sanhedrin, santorum, schneiderman, skenderian, smithereen, smitherman, smotherman, smothermon, sonderman, sumatran, sunderman, syndrome