raw sienna vs caramel brown

raw sienna and caramel brown both are nouns.

Word	Noun	Adjective	Verb	Adverb
raw sienna	Yes	No	No	No
caramel brown	Yes	Yes	No	No

As nouns, raw sienna and caramel brown are synonyms defined as:

Other synonyms of raw sienna include buff, caramel, yellowish brown.

raw sienna (noun)	caramel brown (noun)
a medium to dark tan color	a medium to dark tan color
a yellowish-brown pigment made from untreated sienna

raw sienna (adjective)	caramel brown (adjective)
	having the color of caramel; of a moderate yellow-brown