Sunnah vs way of life

Sunnah and way of life both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sunnah	Yes	No	No	No
way of life	Yes	No	No	No

As nouns, way of life is a hypernym of Sunnah; that is, way of life is a word with a broader meaning than Sunnah:

Sunnah: (Islam) the way of life prescribed as normative for Muslims on the basis of the teachings and practices of Muhammad and interpretations of the Koran
way of life: a course of conduct

Other hypernyms of Sunnah include path, way.

Sunnah (noun)	way of life (noun)
(Islam) the way of life prescribed as normative for Muslims on the basis of the teachings and practices of Muhammad and interpretations of the Koran	a course of conduct