sun plant vs Portulaca grandiflora

sun plant and Portulaca grandiflora both are nouns.

Word	Noun	Adjective	Verb	Adverb
sun plant	Yes	No	No	No
Portulaca grandiflora	Yes	No	No	No

As nouns, sun plant and Portulaca grandiflora are synonyms defined as:

sun plant and Portulaca grandiflora: widely cultivated in many varieties for its fleshy moss-like foliage and profusion of brightly colored flowers

Other synonyms of sun plant include rose moss.

sun plant (noun)	Portulaca grandiflora (noun)
widely cultivated in many varieties for its fleshy moss-like foliage and profusion of brightly colored flowers	widely cultivated in many varieties for its fleshy moss-like foliage and profusion of brightly colored flowers