Disadvantaged and Underclass

Disadvantaged adjective - Kept from having the necessities of life or a healthful environment.

Underclass and disadvantaged are semantically related. In some cases you can use "Underclass" instead the word "Disadvantaged" as a noun or an adjective.

Underclass adjective - Belonging to the lowest and least privileged social stratum.

Disadvantaged and underclass are semantically related. You can use "Disadvantaged" instead the word "Underclass" as a noun or an adjective.