socio-economic class vs estate of the realm

Other hyponyms of socio-economic class include domain, world, age class, agriculture, brotherhood, fraternity, sodality, estate, the three estates, labor, labour, proletariat, working class, lower class, underclass, bourgeoisie, middle class, booboisie, commonality, commonalty, commons, peasantry, demimonde, underworld, yeomanry, caste, caste, upper class, upper crust, ninja, firing line, immigrant class, center, centre, old school, market, craft, trade, fair sex, woman, womanhood, patriciate.