Bull vs worker

Bull and worker both are nouns.

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

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

Other hypernyms of Bull include actor, doer.

Bull (noun)	worker (noun)
the second sign of the zodiac; the sun is in this sign from about April 20 to May 20	sterile member of a colony of social insects that forages for food and cares for the larvae
(astrology) a person who is born while the sun is in Taurus	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