King Lear vs Leir of Britain

King Lear and Leir of Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
King Lear	Yes	No	No	No
Leir of Britain	Yes	No	No	No

As nouns, King Lear and Leir of Britain are synonyms defined as:

King Lear and Leir of Britain: the hero of William Shakespeare's tragedy who was betrayed and mistreated by two of his scheming daughters

Other synonyms of King Lear include Lear.

King Lear (noun)	Leir of Britain (noun)
the hero of William Shakespeare's tragedy who was betrayed and mistreated by two of his scheming daughters	the hero of William Shakespeare's tragedy who was betrayed and mistreated by two of his scheming daughters