Lion vs doer

Lion and doer both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lion	Yes	No	No	No
doer	Yes	No	No	No

As nouns, doer is a hypernym of Lion; that is, doer is a word with a broader meaning than Lion:

Other hypernyms of Lion include actor, worker.

Lion (noun)	doer (noun)
the fifth sign of the zodiac; the sun is in this sign from about July 23 to August 22	a person who acts and gets things done
(astrology) a person who is born while the sun is in Leo