Sunna vs hadith

Sunna and hadith both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sunna	Yes	No	No	No
hadith	Yes	No	No	No

As nouns, Sunna and hadith are synonyms defined as:

Sunna and hadith: (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

Other synonyms of Sunna include Sunnah.

Sunna (noun)	hadith (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	(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