Pyramid vs Great Pyramid

Pyramid and Great Pyramid both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pyramid	Yes	No	No	No
Great Pyramid	Yes	No	No	No

As nouns, Pyramid and Great Pyramid are synonyms defined as:

Pyramid and Great Pyramid: a massive monument with a square base and four triangular sides; begun by Cheops around 2700 BC as royal tombs in ancient Egypt

Other synonyms of Pyramid include Great Pyramid of Giza, Pyramids of Egypt.

Pyramid (noun)	Great Pyramid (noun)
a massive monument with a square base and four triangular sides; begun by Cheops around 2700 BC as royal tombs in ancient Egypt	a massive monument with a square base and four triangular sides; begun by Cheops around 2700 BC as royal tombs in ancient Egypt