sea eryngium vs Eryngium maritimum

sea eryngium and Eryngium maritimum both are nouns.

Word	Noun	Adjective	Verb	Adverb
sea eryngium	Yes	No	No	No
Eryngium maritimum	Yes	No	No	No

As nouns, sea eryngium and Eryngium maritimum are synonyms defined as:

sea eryngium and Eryngium maritimum: European evergreen eryngo with twisted spiny leaves naturalized on United States east coast; roots formerly used as an aphrodisiac

Other synonyms of sea eryngium include sea holly, sea holm.

sea eryngium (noun)	Eryngium maritimum (noun)
European evergreen eryngo with twisted spiny leaves naturalized on United States east coast; roots formerly used as an aphrodisiac	European evergreen eryngo with twisted spiny leaves naturalized on United States east coast; roots formerly used as an aphrodisiac