1. carbonitride - Noun
2. carbonitride - Verb
carbonitride (third-person singular simple present carbonitrides, present participle carbonitriding, simple past and past participle carbonitrided)
English Wikipedia has an article on:CarbonitridingWikipedia
To harden the surface of a metal using carbon and nitrogen
carbonitride (plural carbonitrides)
(inorganic chemistry) A mixed carbide and nitride