Chemetron rhymes with:
cyclotron, negatron, phototron, tevatron, ticketron, aequitron, altron, certron, cyclotron, electron, elektron, invitron, negatron, phototron, solitron, telectron, tevatron, textron, ticketron, vernitron
Chemetron sounds like:
centram, centromin, centurion, cintron, condren, condron, contran, contrarian, conundrum, cosmodrome, counterman, countryman, countrymen