preternatural vs uncanny

preternatural and uncanny both are adjectives.

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

As adjectives, preternatural and uncanny are synonyms defined as:

preternatural (adjective)	uncanny (adjective)
surpassing the ordinary or normal	surpassing the ordinary or normal
existing outside of or not in accordance with nature	suggesting the operation of supernatural influences