upside-down vs inverted

upside-down and inverted both are adjectives.

Word	Noun	Adjective	Verb	Adverb
upside-down	No	Yes	No	No
inverted	No	Yes	No	No

As adjectives, upside-down and inverted are synonyms defined as:

upside-down and inverted: being in such a position that top and bottom are reversed

upside-down (adjective)	inverted (adjective)
being in such a position that top and bottom are reversed	(of a plant ovule) completely inverted; turned back 180 degrees on its stalk
	being in such a position that top and bottom are reversed