carbonous vs carboniferous

carbonous and carboniferous both are adjectives.

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

As adjectives, carbonous and carboniferous are synonyms defined as:

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

Other synonyms of carbonous include carbonaceous, carbonic.

carbonous (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