thrall vs slavery

thrall and slavery both are nouns.

Word	Noun	Adjective	Verb	Adverb
thrall	Yes	No	No	No
slavery	Yes	No	No	No

As nouns, thrall and slavery are synonyms defined as:

thrall and slavery: the state of being under the control of another person

Other synonyms of thrall include bondage, thraldom, thralldom.

thrall (noun)	slavery (noun)
someone held in bondage	work done under harsh conditions for little or no pay
the state of being under the control of another person	the practice of owning slaves
	the state of being under the control of another person