subshrub vs suffrutex

subshrub and suffrutex both are nouns.

Word	Noun	Adjective	Verb	Adverb
subshrub	Yes	No	No	No
suffrutex	Yes	No	No	No

As nouns, subshrub and suffrutex are synonyms defined as:

subshrub and suffrutex: low-growing woody shrub or perennial with woody base

subshrub (noun)	suffrutex (noun)
low-growing woody shrub or perennial with woody base	low-growing woody shrub or perennial with woody base