heath aster vs Aster ericoides

heath aster and Aster ericoides both are nouns.

Word	Noun	Adjective	Verb	Adverb
heath aster	Yes	No	No	No
Aster ericoides	Yes	No	No	No

As nouns, heath aster and Aster ericoides are synonyms defined as:

heath aster and Aster ericoides: common much-branched North American perennial with heathlike foliage and small starry white flowers

heath aster (noun)	Aster ericoides (noun)
common much-branched North American perennial with heathlike foliage and small starry white flowers	common much-branched North American perennial with heathlike foliage and small starry white flowers
common North American perennial with heathlike foliage and small white flower heads