carbonado vs black diamond

carbonado and black diamond both are nouns.

Word	Noun	Adjective	Verb	Adverb
carbonado	Yes	No	No	No
black diamond	Yes	No	No	No

As nouns, carbonado and black diamond are synonyms defined as:

carbonado and black diamond: an inferior dark diamond used in industry for drilling and polishing

carbonado (noun)	black diamond (noun)
a piece of meat (or fish) that has been scored and broiled	an inferior dark diamond used in industry for drilling and polishing
an inferior dark diamond used in industry for drilling and polishing