commons vs stratum

commons and stratum both are nouns.

Word	Noun	Adjective	Verb	Adverb
commons	Yes	No	No	No
stratum	Yes	No	No	No

As nouns, stratum is a hypernym of commons; that is, stratum is a word with a broader meaning than commons:

Other hypernyms of commons include class, social class, socio-economic class.

commons (noun)	stratum (noun)
a class composed of persons lacking clerical or noble rank	an abstract place usually conceived as having depth
a piece of open land for recreational use in an urban area	a subpopulation divided into a stratified sampling
a pasture subject to common use	people having the same social, economic, or educational status
	one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock)