finisher vs worker

finisher and worker both are nouns.

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

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

finisher (noun)	worker (noun)
an animal that wins in a contest of speed	sterile member of a colony of social insects that forages for food and cares for the larvae
a race car that finishes a race	a person who works at a specific occupation
a worker who performs the last step in a manufacturing process	a member of the working class (not necessarily employed)
a painter who applies a finishing coat	a person who acts and gets things done
(baseball) a relief pitcher who can protect a lead in the last inning or two of the game
a racing driver who finishes a race