You could make a big change as in:
She turned over a new leaf.
There is also a phrase that goes like this:
If he knew what happened, he would turn over in his grave.
You can also put these two words together to make the noun, turnover. Here are some sentences with “turnover” as a noun:
Due to the transient nature of its workforce, the company had high employee turnover.
Her favorite dessert at the bakery was the apple turnover.
I hope this is helpful.
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