sweater vs worker

sweater and worker both are nouns.

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

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

Other hypernyms of sweater include actor, doer.

sweater (noun)	worker (noun)
a crocheted or knitted garment covering the upper part of the body	sterile member of a colony of social insects that forages for food and cares for the larvae
a person who perspires	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