sea holm vs sea eryngium

sea holm and sea eryngium both are nouns.

Word	Noun	Adjective	Verb	Adverb
sea holm	Yes	No	No	No
sea eryngium	Yes	No	No	No

As nouns, sea holm and sea eryngium are synonyms defined as:

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

Other synonyms of sea holm include Eryngium maritimum, sea holly.

sea holm (noun)	sea eryngium (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