alizarin red vs alizarin carmine

alizarin red and alizarin carmine both are nouns.

Word	Noun	Adjective	Verb	Adverb
alizarin red	Yes	No	No	No
alizarin carmine	Yes	No	No	No

As nouns, alizarin red and alizarin carmine are synonyms defined as:

alizarin red and alizarin carmine: any of various acid dyes; used for dyeing wool scarlet red

Other synonyms of alizarin red include alizarin crimson.

alizarin red (noun)	alizarin carmine (noun)
any of various acid dyes; used for dyeing wool scarlet red	any of various acid dyes; used for dyeing wool scarlet red