sea lavender vs suffrutex

sea lavender and suffrutex both are nouns.

Word	Noun	Adjective	Verb	Adverb
sea lavender	Yes	No	No	No
suffrutex	Yes	No	No	No

As nouns, suffrutex is a hypernym of sea lavender; that is, suffrutex is a word with a broader meaning than sea lavender:

sea lavender: any of various plants of the genus Limonium of temperate salt marshes having spikes of white or mauve flowers
suffrutex: low-growing woody shrub or perennial with woody base

Other hypernyms of sea lavender include subshrub.

sea lavender (noun)	suffrutex (noun)
any of various plants of the genus Limonium of temperate salt marshes having spikes of white or mauve flowers	low-growing woody shrub or perennial with woody base