adamant vs carbonado

adamant and carbonado both are nouns.

Word	Noun	Adjective	Verb	Adverb
adamant	Yes	Yes	No	No
carbonado	Yes	No	No	No

As nouns, carbonado is a hyponym of adamant; that is, carbonado is a word with a more specific, narrower meaning than adamant:

adamant: very hard native crystalline carbon valued as a gem
carbonado: an inferior dark diamond used in industry for drilling and polishing

Other hyponyms of adamant include black diamond.

adamant (noun)	carbonado (noun)
very hard native crystalline carbon valued as a gem	a piece of meat (or fish) that has been scored and broiled
	an inferior dark diamond used in industry for drilling and polishing

adamant (adjective)	carbonado (adjective)
impervious to pleas, persuasion, requests, reason