Rubia tinctorum vs madder

Rubia tinctorum and madder both are nouns.

Word	Noun	Adjective	Verb	Adverb
Rubia tinctorum	Yes	No	No	No
madder	Yes	No	Yes	No

As nouns, Rubia tinctorum and madder are synonyms defined as:

Rubia tinctorum and madder: Eurasian herb having small yellow flowers and red roots formerly an important source of the dye alizarin

Rubia tinctorum (noun)	madder (noun)
Eurasian herb having small yellow flowers and red roots formerly an important source of the dye alizarin	Eurasian herb having small yellow flowers and red roots formerly an important source of the dye alizarin

Rubia tinctorum (verb)	madder (verb)
	color a moderate to strong red