charcoal burner vs worker

charcoal burner and worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
charcoal burner	Yes	No	No	No
worker	Yes	No	No	No

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

charcoal burner (noun)	worker (noun)
a stove that burns charcoal as fuel	sterile member of a colony of social insects that forages for food and cares for the larvae
a worker whose job is to make charcoal	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