alizarin vs alizarine

alizarin and alizarine both are nouns.

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

As nouns, alizarin and alizarine are synonyms defined as:

alizarin and alizarine: an orange-red crystalline compound used in making red pigments and in dyeing

alizarin (noun)	alizarine (noun)
an orange-red crystalline compound used in making red pigments and in dyeing	an orange-red crystalline compound used in making red pigments and in dyeing