carbonaceous vs carboniferous

carbonaceous and carboniferous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
carbonaceous	No	Yes	No	No
carboniferous	No	Yes	No	No

As adjectives, carbonaceous and carboniferous are synonyms defined as:

carbonaceous and carboniferous: relating to or consisting of or yielding carbon

Other synonyms of carbonaceous include carbonic, carbonous.

carbonaceous (adjective)	carboniferous (adjective)
relating to or consisting of or yielding carbon	relating to or consisting of or yielding carbon
	of or relating to the Carboniferous geologic era