Dedication: 3/15/05

caput (gen. capitis): head; praeceps: headlong; praecipuus: distinguished

achievable, achieve, achievement, achiever, ancipital, beef cattle, biceps, bicipital,cabbage, cabbage-eater, cabbage-flower, cabbage-plant, cabochon, cabouche, cabosh, cad, cadastral, cadastre, caddie, caddy, cadet, cadetship, cap, cape (land), capita, capital, capitalism, capitalist, capitalistic, capitalization, capitalize, capitally, capitate, capitatim, capitation, capitative, capitol, capitulant, capitular, capitulary, capitulate, capitulation, capitulationism, capitulationist, capitulator, capitulum, capo, caps, captain, captaincy, Captain Nemo, captainship, caput, catalo, cattle, cattleman, caudillo, chapter, chattel, chef, chef d’oeuvre (Fr), chevet, chief, chiefly, chieftain, chieftainship, cocaptain, commander-in-chief, co-precipitate, co-precipitation, dairy cattle, decapitalization, decapitalize, decapitate, decapitation, decapitator, exoccipital, handkerchief, jefe, kerchief, mischief, mischiefmaker, mischievous, mischievously, neckerchief, neocapitalist, noncapital, occipital, occiput, overachieve, overachiever, overcapitalize, paroccipital, per capita, planicipital, police captain, post captain, pre-capitalist, precipice, precipitable, precipitance, precipitancy, precipitant, precipitate, precipitately, precipitation, precipitative, precipitator, precipitous, precipitously, quadriceps, recap, recapitulate, recapitulation, sea captain, sinciput, space cadet, state capitalism, subcapital, suboccipital, tricaptain, triceps, unachieved

Cap, cape etc. derive from cappa (LL), ultimately (according to AHD) from caput.
carbo: charcoal

bicarbonate, boron, carbide, carbohydrate, carbolic, carbon, carbonaceous, carbonate, carbon copy, carbon dating, carbon dioxide, carbonic, carboniferous, carbonification, carbonify, carbonigenous, carbonite, carbonization, carbonize, carbon monoxide, carbon paper, carboxyl, carboxylic, carbuncle, carburation, carburization, carburetor, decacarbon, decarbonate, decarbonization, decarbonize, decarbonizer, decarburator, decarburize, dicarbon, fluorocarbon, halocarbon, heptacarbon, hydrocarbon, oxycarbonate, pentacarbon, polycarbonate, protocarbide, radiocarbon, thiocarbonate, tricarbon

OED says boron combination of borax and the -on of carbon.