marsh rosemary vs sea lavender

marsh rosemary and sea lavender both are nouns.

Word	Noun	Adjective	Verb	Adverb
marsh rosemary	Yes	No	No	No
sea lavender	Yes	No	No	No

As nouns, marsh rosemary and sea lavender are synonyms defined as:

marsh rosemary and sea lavender: any of various plants of the genus Limonium of temperate salt marshes having spikes of white or mauve flowers

Other synonyms of marsh rosemary include statice.

marsh rosemary (noun)	sea lavender (noun)
any of various plants of the genus Limonium of temperate salt marshes having spikes of white or mauve flowers	any of various plants of the genus Limonium of temperate salt marshes having spikes of white or mauve flowers