PED pedal pedestal pedicure pedometer biped centipede quadruped tripod expedition expeditionary expeditious expedience impede expedient expedite impediment pedestrian

　　FLEC/FLEX flexible flexibility flexion circumflex inflexible inflexibility deflection inflect reflect reflection reflective reflex reflexive deflect flexor genuflect inflection

　　POST postdate postdoctoral posterity postern postgraduate postlude postmeridian postnatal postnuptial postpone postscript posterior posthumous postmodern postmortem

　　CAR career cargo carry carriage carrier cart carter charge discharge chariot

　　CAST broadcast forecast outcast overcast telecast

　　CAV cave cavern cavernous cavity concave excavate excavator

　　CELER celerity accelerate acceleration accelerator decelerate

　　CERN/CRET concern concerning concernment discern discernable discernment discreet discrete discretion excrete excrement secret secretary secrete secretion

　　CERT ascertain certain certainty certify certifiable certificate certification certitude concert disconcert

　　CITE citable citation excite excitable excitant excitement incite incitement recite recital recitation resuscitate resuscitator solicit solicitation solicitor solicitous solicitude

　　CLIN acclivity decline declension declination declivity declivous incline inclination disincline disinclination proclivity recline climax

　　COCT concoct concoction decoct decoction precocious precocity

　　COGNIS agnostic cognition cognitive cognizable cognizance cognizant diagnose diagnosis ignore ignorance ignorant incognito prognosis prognosticate recognize

　　recognizable recognizance recognition

　　COMMUN commune communal communalize communicate communication communion communism communist community

　　COUNT countdown counter account accountable discount recount

　　COVER coverage covert discover discovery recover uncover

　　CRUC crucial crucify cruciform crucifix crusade cruise crux excruciate

　　CULT cultivable cultivate cultivated cultivation culture cultural acculturate agriculture agricultural apiculture aquiculture aviculture floriculture sericulture colony colonial colonist colonize

　　CUSS concuss concussion discuss discussion percussion repercussion quash