royal velvet plant vs purple velvet plant

royal velvet plant and purple velvet plant both are nouns.

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

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

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

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

royal velvet plant (noun)	purple 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