thrift vs subshrub

thrift and subshrub both are nouns.

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

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

thrift: any of numerous sun-loving low-growing evergreens of the genus Armeria having round heads of pink or white flowers
subshrub: low-growing woody shrub or perennial with woody base

Other hypernyms of thrift include suffrutex.

thrift (noun)	subshrub (noun)
extreme care in spending money; reluctance to spend money unnecessarily	low-growing woody shrub or perennial with woody base
any of numerous sun-loving low-growing evergreens of the genus Armeria having round heads of pink or white flowers