piecework vs employment

piecework and employment both are nouns.

Word	Noun	Adjective	Verb	Adverb
piecework	Yes	No	No	No
employment	Yes	No	No	No

As nouns, employment is a hypernym of piecework; that is, employment is a word with a broader meaning than piecework:

Other hypernyms of piecework include work.

piecework (noun)	employment (noun)
work paid for according to the quantity produced	the occupation for which you are paid
	the act of using
	the act of giving someone a job
	the state of being employed or having a job