upending vs turnover

upending and turnover both are nouns.

Word	Noun	Adjective	Verb	Adverb
upending	Yes	No	No	No
turnover	Yes	No	No	No

As nouns, turnover is a hyponym of upending; that is, turnover is a word with a more specific, narrower meaning than upending:

Other hyponyms of upending include overturn, upset.

upending (noun)	turnover (noun)
turning upside down; setting on end	the act of upsetting something
	the volume measured in dollars
	a dish made by folding a piece of pastry over a filling
	the ratio of the number of workers that had to be replaced in a given time period to the average number of workers