Pantex rhymes with:
ashtec's, cortex, semtex, vortex, abex, albunex, alpex, ashtec's, avanex, cognex, complex, cortex, culex, dudeck's, forex, gemex, genex, ibex, immunex, index, inlex, koscheck's, micrografx, mondex, moulinex, ovex, patlex, proctorsilex, purex, quadrex, qualex, quanex, reflex, rolex, rorex, royex, semtex, simex, spinifex, timex, trizec's, uzbeks, vortex
Pantex sounds like:
paints, pandas, pandick, panetta's, panties, pantoja, pants, pantuso, pantyhose, pavements, payments, peanuts, pennants, pentax, pentech, penthouse, penthouses, pentz, phonetic, phonetics, pinetta's, pint-size, pints, piontek, piontkowski, pneumatic, pneumatics, point's, points, pond's, ponds, poniatowski, pont's, pontes, pontiac, pontiac's, pontiacs, pontikes, pontious, pontius, ponts, pound's, poundage, pounds, puentes, pundits, punts