admix affix aftertax annex anthrax anticlimax antitax apex appendix autoindex ax biconvex boombox borax box breadbox calyx cervix circumflex climax coax complex convex cortex crucifix crux demultiplex dex duplex earwax efflux equinox ex fax fix flax flex flux fox gearbox gox helix hex hoax ibex icebox index infix influx intermix jinx jukebox kex kickbox larynx latex lax lex lox lummox lunchbox lux lynx mailbox matchbox matrix max mesothorax metathorax minimax mix multiplex nasopharynx nix onyx orthodox outfox overtax ox paradox parallax pax perplex phalanx pharynx phoenix pix planoconvex postfix pox prefix pretax prolix prothorax pyx radix rax reflex relax rex sandbox sardonyx sax sex shoebox simplex six smallpox soapbox sox spandex sphinx styx suffix surtax syntax tarbox tax teabox thorax tinderbox toolbox transfix tux unorthodox vertex vex vortex vox wax xerox zax