alizarin crimson vs alizarine

alizarin crimson and alizarine both are nouns.

Word	Noun	Adjective	Verb	Adverb
alizarin crimson	Yes	No	No	No
alizarine	Yes	No	No	No

As nouns, alizarine is a hypernym of alizarin crimson; that is, alizarine is a word with a broader meaning than alizarin crimson:

alizarin crimson: any of various acid dyes; used for dyeing wool scarlet red
alizarine: an orange-red crystalline compound used in making red pigments and in dyeing

Other hypernyms of alizarin crimson include alizarin.

alizarin crimson (noun)	alizarine (noun)
any of various acid dyes; used for dyeing wool scarlet red	an orange-red crystalline compound used in making red pigments and in dyeing