Negatron rhymes with:
chemetron, cyclotron, phototron, tevatron, ticketron, aequitron, altron, certron, chemetron, cyclotron, electron, elektron, invitron, phototron, solitron, telectron, tevatron, textron, ticketron, vernitron
Negatron sounds like:
nestorian, newstrom, nicoderm, nonsectarian, nystrom