white violet vs woodland white violet

white violet and woodland white violet both are nouns.

Word	Noun	Adjective	Verb	Adverb
white violet	Yes	No	No	No
woodland white violet	Yes	No	No	No

As nouns, white violet and woodland white violet are synonyms defined as:

white violet and woodland white violet: short-stemmed violet of eastern North America having fragrant purple-veined white flowers

Other synonyms of white violet include sweet white violet, Viola blanda.

white violet (noun)	woodland white violet (noun)
short-stemmed violet of eastern North America having fragrant purple-veined white flowers	short-stemmed violet of eastern North America having fragrant purple-veined white flowers
tall North American perennial with heart-shaped leaves and white flowers with purple streaks