Teach vs Blackbeard

Teach and Blackbeard both are nouns.

Word	Noun	Adjective	Verb	Adverb
Teach	Yes	No	No	No
Blackbeard	Yes	No	No	No

As nouns, Teach and Blackbeard are synonyms defined as:

Teach and Blackbeard: an English pirate who operated in the Caribbean and off the Atlantic coast of North America (died in 1718)

Other synonyms of Teach include Edward Teach, Edward Thatch, Thatch.

Teach (noun)	Blackbeard (noun)
an English pirate who operated in the Caribbean and off the Atlantic coast of North America (died in 1718)	an English pirate who operated in the Caribbean and off the Atlantic coast of North America (died in 1718)