sea aster vs Aster tripolium

sea aster and Aster tripolium both are nouns.

Word	Noun	Adjective	Verb	Adverb
sea aster	Yes	No	No	No
Aster tripolium	Yes	No	No	No

As nouns, sea aster and Aster tripolium are synonyms defined as:

sea aster and Aster tripolium: a common European aster that grows in salt marshes

Other synonyms of sea aster include sea starwort.

sea aster (noun)	Aster tripolium (noun)
a common European aster that grows in salt marshes	a common European aster that grows in salt marshes