Magen David vs Mogen David

Magen David and Mogen David both are nouns.

Word	Noun	Adjective	Verb	Adverb
Magen David	Yes	No	No	No
Mogen David	Yes	No	No	No

As nouns, Magen David and Mogen David are synonyms defined as:

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

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

Magen David (noun)	Mogen 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