Ashtec's rhymes with:
cortex, pantex, semtex, vortex, abex, albunex, alpex, avanex, cognex, complex, cortex, culex, dudeck's, forex, gemex, genex, ibex, immunex, index, inlex, koscheck's, micrografx, mondex, moulinex, ovex, pantex, patlex, proctorsilex, purex, quadrex, qualex, quanex, reflex, rolex, rorex, royex, semtex, simex, spinifex, timex, trizec's, uzbeks, vortex
Ashtec's sounds like:
accedes, acetic, achatz, acidic, acidosis, acids, acoustic, acoustics, acquits, act's, acts, actus, aesthete's, aesthetes, aesthetic, aesthetics, agates, akita's, aquatic, ascetic, ashtec, asiatic, asides, assad's, assets, assets', assiduous, assists, associate's, associates, associates', august's, augusta's, augustus, auschwitz, azides, aztec, azteca, aztecs