Synonyms for Underprivileged:

adj.

disadvantaged (adjective)
depressed.
poor (adjective)
indigent, unfortunate, in need, poor, educationally handicapped, poverty-stricken, penniless, impoverished, struggling, disadvantaged, destitute, deprived, needy, depressed, badly off.

n.

underprivileged (noun)
disadvantaged, deprived, underclass.

Other synonyms:

poor. backward, depressed. impoverished. unfortunate. Other relevant words:
in need, destitute, poor, needy, poverty-stricken, penniless, depressed, badly off, impoverished, unfortunate, backward, indigent.