Endotronics' rhymes with:
audiotronics, centronics, electronics, electronics', endotronics, flextronics, microelectronics, photronics, plantronics, tektronix, telectronics, vitronics
Endotronics' sounds like:
endearing, endothermic, endotronics, endotronics's, endurance, enduring, entering, entrance, entrances, entrench, entrenches