purple velvet plant vs velvet plant

purple velvet plant and velvet plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
purple velvet plant	Yes	No	No	No
velvet plant	Yes	No	No	No

As nouns, purple velvet plant and velvet plant are synonyms defined as:

purple velvet plant and velvet plant: Javanese foliage plant grown for their handsome velvety leaves with violet-purple hairs

Other synonyms of purple velvet plant include Gynura aurantiaca, royal velvet plant.

purple velvet plant (noun)	velvet plant (noun)
Javanese foliage plant grown for their handsome velvety leaves with violet-purple hairs	Javanese foliage plant grown for their handsome velvety leaves with violet-purple hairs
	any of various plants of the genus Verbascum having large usually woolly leaves and terminal spikes of yellow or white or purplish flowers