hard worker vs slave

hard worker and slave both are nouns.

Word	Noun	Adjective	Verb	Adverb
hard worker	Yes	No	No	No
slave	Yes	No	Yes	No

As nouns, hard worker and slave are synonyms defined as:

Other synonyms of hard worker include striver.

hard worker (noun)	slave (noun)
someone who works as hard as a slave	a person who is owned by someone
	someone who works as hard as a slave
	someone entirely dominated by some influence or person

hard worker (verb)	slave (verb)
	work very hard, like a slave