Libra vs worker

Libra and worker both are nouns.

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

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

Other hypernyms of Libra include actor, doer.

Libra (noun)	worker (noun)
the seventh sign of the zodiac; the sun is in this sign from about September 23 to October 22	sterile member of a colony of social insects that forages for food and cares for the larvae
a small faint zodiacal constellation in the Southern Hemisphere; between Virgo and Scorpius	a person who works at a specific occupation
(astrology) a person who is born while the sun is in Libra	a member of the working class (not necessarily employed)
	a person who acts and gets things done