pruner vs worker

pruner and worker both are nouns.

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

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

pruner (noun)	worker (noun)
a long-handled pruning saw with a curved blade at the end and sometimes a clipper; used to prune small trees	sterile member of a colony of social insects that forages for food and cares for the larvae
a worker who thins out and trims trees and shrubs	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