The Oxford Thesaurus An A-Z Dictionary of Synonyms - slavery n.

1) enslavement, bondage, thraldom, thrall, enthralment, servitude, serfdom, vassalage, yoke; subjugation, captivity, Historical US peculiar institution: All of those ancient cultures that we venerate practised slavery. 2) slave-trade, blackbirding: No one ever mentions that the family fortune had been made from slavery. 3) toil, moil, drudgery, travail, grind, strain, (hard) labour: She remembered the years of slavery she had spent at the kitchen sink.