changer vs worker

changer and worker both are nouns.

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

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

Other hypernyms of changer include actor, doer.

changer (noun)	worker (noun)
an automatic mechanical device on a record player that causes new records to be played without manual intervention	sterile member of a colony of social insects that forages for food and cares for the larvae
a person who changes something	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