stratum vs socio-economic class

stratum and socio-economic class both are nouns.

Word	Noun	Adjective	Verb	Adverb
stratum	Yes	No	No	No
socio-economic class	Yes	No	No	No

As nouns, stratum and socio-economic class are synonyms defined as:

stratum and socio-economic class: people having the same social, economic, or educational status

Other synonyms of stratum include class, social class.

stratum (noun)	socio-economic class (noun)
an abstract place usually conceived as having depth	people having the same social, economic, or educational status
a subpopulation divided into a stratified sampling
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)