Solomon's seal vs Magen David

Solomon's seal and Magen David both are nouns.

Word	Noun	Adjective	Verb	Adverb
Solomon's seal	Yes	No	No	No
Magen David	Yes	No	No	No

As nouns, Solomon's seal and Magen David are synonyms defined as:

Solomon's seal and Magen David: a six-pointed star formed from two equilateral triangles; an emblem symbolizing Judaism

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

Solomon's seal (noun)	Magen 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