English violet vs Viola odorata

English violet and Viola odorata both are nouns.

Word	Noun	Adjective	Verb	Adverb
English violet	Yes	No	No	No
Viola odorata	Yes	No	No	No

As nouns, English violet and Viola odorata are synonyms defined as:

English violet and Viola odorata: European violet typically having purple to white flowers; widely naturalized

Other synonyms of English violet include garden violet, sweet violet.

English violet (noun)	Viola odorata (noun)
European violet typically having purple to white flowers; widely naturalized	European violet typically having purple to white flowers; widely naturalized