pisser vs worker

pisser and worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
pisser	Yes	No	No	No
worker	Yes	No	No	No

As nouns, worker is a hypernym of pisser; that is, worker is a word with a broader meaning than pisser:

Other hypernyms of pisser include actor, doer.

pisser (noun)	worker (noun)
a very disagreeable difficulty	sterile member of a colony of social insects that forages for food and cares for the larvae
a person who urinates	a person who works at a specific occupation
	a member of the working class (not necessarily employed)
	a person who acts and gets things done