Unix rhymes with:
munich's, munich's, audiotronics, avionics, beatniks, calisthenics, centronics, chamonix, chetniks, clinic's, clinics, conics, cryogenics, cynics, diasonics, dominic's, ebonics, electronics, electronics', endotronics, endotronics', enix, environics, ethnics, eugenics, fibronics, flextronics, harmonics, hispanics, histrionics, ionics, kibbutzniks, lasersonics, lumonics, mannix, mechanics, mechanics', microelectronics, minix, minnix, mnemonics, molonicks, mullenix, mullinix, mulnix, munich's, nucleonics, onyx, organics, panic's, panics, penix, pennix, personics, phenix, philharmonic's, phoenix, phonics, photronics, pinnix, plantronics, pyrotechnics, refuseniks, resnick's, respironics, sconnix, siliconix, skolniks, sonics, sputniks, technics, tectonics, tektronix, telectronics, telephonics, tonics, vinick's, vinnick's, vitronics
Unix sounds like:
umansky, umass, unanimous, unease, uneasy, unesco, ung, ungo, unhinge, unhook, unigesco, union's, unionize, unions, unions', unique, unisex, unisys, unisys', unisys's, unmanage, unmask, unos, unwise, unz