nonnatural vs preternatural

nonnatural and preternatural both are adjectives.

Word	Noun	Adjective	Verb	Adverb
nonnatural	No	Yes	No	No
preternatural	No	Yes	No	No

As adjectives, nonnatural and preternatural are synonyms defined as:

nonnatural and preternatural: existing outside of or not in accordance with nature

Other synonyms of nonnatural include otherworldly, transcendental.

nonnatural (adjective)	preternatural (adjective)
existing outside of or not in accordance with nature	surpassing the ordinary or normal
	existing outside of or not in accordance with nature