Words with 1 syllable
box, ficcheux, fix, flex, hex, marx, mix, sax, sex, slax, styx, tex, vax, wax, x.
Words with 2 syllables
alex, baraetex, bardeux, blackbox, charitex, complex, eakondex, furontex, icebox, index, jukebox, latex, ma-ketex, maketex, matrix, otax, phoenix, prefix, relax, rolex, shi-raux, shiraux, siraux, supo-tex, supotex, syntax, ultravox, usenix, vortex, xerox, zerox.
Words with 3 syllables
aidentex, borantex, dexi-dex, dexidex, discbox, orthodox, paradox, reko-dex, rekodex, riaritex, romantex, saientex, sofutoux, supi-dex, supidex, unix.