loose cannon vs worker

loose cannon and worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
loose cannon	Yes	No	No	No
worker	Yes	No	No	No

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

loose cannon: a person who is expected to perform a particular task but who is out of control and dangerous
worker: a person who acts and gets things done

Other hypernyms of loose cannon include actor, doer.

loose cannon (noun)	worker (noun)
a person who is expected to perform a particular task but who is out of control and dangerous	sterile member of a colony of social insects that forages for food and cares for the larvae
	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