sea holly vs Acanthus mollis

sea holly and Acanthus mollis both are nouns.

Word	Noun	Adjective	Verb	Adverb
sea holly	Yes	No	No	No
Acanthus mollis	Yes	No	No	No

As nouns, sea holly and Acanthus mollis are synonyms defined as:

sea holly and Acanthus mollis: widely cultivated southern European acanthus with whitish purple-veined flowers

Other synonyms of sea holly include bear's breech, bear's breeches.

sea holly (noun)	Acanthus mollis (noun)
European evergreen eryngo with twisted spiny leaves naturalized on United States east coast; roots formerly used as an aphrodisiac	widely cultivated southern European acanthus with whitish purple-veined flowers
widely cultivated southern European acanthus with whitish purple-veined flowers