Centrex rhymes with:
intrex, syntrex, intrex, syntrex, barracks, horrocks, intrex, microx, norex, serex, syntrex, terex, verex
Centrex sounds like:
cantor's, cantors, cassandras, cemeteries, centaur's, centaurs, center's, centerre's, centers, centers', centres, centuries, century's, chandrika, chandross, cinders, cindric, comandeers, commander's, commanders, commentaries, commentator's, commentators, commenters, commodore's, commuters, comtrex, condors, condracky, condracky's, contours, contras, contras', contreras, counters, countersue, countries, countries', country's