bill sticker vs worker

bill sticker and worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
bill sticker	Yes	No	No	No
worker	Yes	No	No	No

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

bill sticker: someone who pastes up bills or placards on walls or billboards
worker: a person who works at a specific occupation

bill sticker (noun)	worker (noun)
someone who pastes up bills or placards on walls or billboards	sterile member of a colony of social insects that forages for food and cares for the larvae
	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