Cancer vs worker

Cancer and worker both are nouns.

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

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

Other hypernyms of Cancer include actor, doer.

Cancer (noun)	worker (noun)
type genus of the family Cancridae	sterile member of a colony of social insects that forages for food and cares for the larvae
the fourth sign of the zodiac; the sun is in this sign from about June 21 to July 22	a person who works at a specific occupation
a small zodiacal constellation in the Northern Hemisphere; between Leo and Gemini	a member of the working class (not necessarily employed)
(astrology) a person who is born while the sun is in Cancer	a person who acts and gets things done