tier up vs worker

tier up and worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
tier up	Yes	No	No	No
worker	Yes	No	No	No

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

tier up (noun)	worker (noun)
a worker who ties something	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