signer vs worker

signer and worker both are nouns.

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

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

Other hypernyms of signer include actor, doer.

signer (noun)	worker (noun)
someone who signs and is bound by a document	sterile member of a colony of social insects that forages for food and cares for the larvae
someone who can use sign language to communicate	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