-carbia comes from the Latin 'carbo', which means charcoal. Charcoal, despite being made of carbon, is clearly not carbon dioxide gas though. ... Both words refer to increased levels of carbon dioxide in the blood. However, the Greek word part for (a condition of the) blood, -emia, is nowhere to be found in either.
Source: hypercapnia vs hypercarbia | study.com
hypercarbic vs hypercapnic