field pansy vs Viola arvensis

field pansy and Viola arvensis both are nouns.

Word	Noun	Adjective	Verb	Adverb
field pansy	Yes	No	No	No
Viola arvensis	Yes	No	No	No

As nouns, field pansy and Viola arvensis are synonyms defined as:

field pansy and Viola arvensis: common Old World viola with creamy often violet-tinged flowers

Other synonyms of field pansy include heartsease.

field pansy (noun)	Viola arvensis (noun)
common Old World viola with creamy often violet-tinged flowers	common Old World viola with creamy often violet-tinged flowers