phlox parallax chicken pox pix phalanx
X- Rays :P
Five letter words starting with C and ending with X are calyx and codex.
thorax
Panamax : the largest cargo ship that will pass through the Panama Canal.
apexexpandexpendexpectexperienceexpireexplainexpertexplicitexploitexploreexportexpressexpungeexemptpillboxpixpixie
Quincunx is a word. It ends with X.
box, fox, ibex
anthrax
orthodox
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern --P--P--X. That is, nine letter words with 3rd letter P and 6th letter P and 9th letter X. In alphabetical order, they are: unperplex
xeriscape
· x-ray · Xerox · xylophone