upturned vs overturned

upturned and overturned both are adjectives.

Word	Noun	Adjective	Verb	Adverb
upturned	No	Yes	No	No
overturned	No	Yes	No	No

As adjectives, upturned and overturned are synonyms defined as:

upturned and overturned: having been turned so that the bottom is no longer the bottom

Other synonyms of upturned include upset.

upturned (adjective)	overturned (adjective)
(used of noses) turned up at the end	having been turned so that the bottom is no longer the bottom
having been turned so that the bottom is no longer the bottom