garden angelica vs Angelica Archangelica

garden angelica and Angelica Archangelica both are nouns.

Word	Noun	Adjective	Verb	Adverb
garden angelica	Yes	No	No	No
Angelica Archangelica	Yes	No	No	No

As nouns, garden angelica and Angelica Archangelica are synonyms defined as:

garden angelica and Angelica Archangelica: a biennial cultivated herb; its stems are candied and eaten and its roots are used medicinally

Other synonyms of garden angelica include archangel.

garden angelica (noun)	Angelica Archangelica (noun)
a biennial cultivated herb; its stems are candied and eaten and its roots are used medicinally	a biennial cultivated herb; its stems are candied and eaten and its roots are used medicinally