Magen David vs Shield of David

Magen David and Shield of David both are nouns.

Word	Noun	Adjective	Verb	Adverb
Magen David	Yes	No	No	No
Shield of David	Yes	No	No	No

As nouns, Magen David and Shield of David are synonyms defined as:

Magen David and Shield of David: a six-pointed star formed from two equilateral triangles; an emblem symbolizing Judaism

Other synonyms of Magen David include Mogen David, Solomon's seal, Star of David.

Magen David (noun)	Shield of David (noun)
a six-pointed star formed from two equilateral triangles; an emblem symbolizing Judaism	a six-pointed star formed from two equilateral triangles; an emblem symbolizing Judaism