life-of-man vs subshrub

life-of-man and subshrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
life-of-man	Yes	No	No	No
subshrub	Yes	No	No	No

As nouns, subshrub is a hypernym of life-of-man; that is, subshrub is a word with a broader meaning than life-of-man:

life-of-man: unarmed woody rhizomatous perennial plant distinguished from wild sarsaparilla by more aromatic roots and panicled umbels; southeastern North America to Mexico
subshrub: low-growing woody shrub or perennial with woody base

Other hypernyms of life-of-man include suffrutex.

life-of-man (noun)	subshrub (noun)
unarmed woody rhizomatous perennial plant distinguished from wild sarsaparilla by more aromatic roots and panicled umbels; southeastern North America to Mexico	low-growing woody shrub or perennial with woody base