heartsease vs Viola arvensis

heartsease and Viola arvensis both are nouns.

Word	Noun	Adjective	Verb	Adverb
heartsease	Yes	No	No	No
Viola arvensis	Yes	No	No	No

As nouns, heartsease and Viola arvensis are synonyms defined as:

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

Other synonyms of heartsease include field pansy.

heartsease (noun)	Viola arvensis (noun)
the absence of mental stress or anxiety	common Old World viola with creamy often violet-tinged flowers
common Old World viola with creamy often violet-tinged flowers
violet of Pacific coast of North America having white petals tinged with yellow and deep violet
a common and long cultivated European herb from which most common garden pansies are derived