What's the difference between these 2 terms?
thank u guys
Blush implies shame, embarrasment or modesty while flush can be associated with robust health, anger, fever or hard drinking.
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Also, blush is what women put on their cheeks to give them more of a reddish tone.

Flush is what you do after you use the bathroom...heheh.
...and what's the right pronounciation for these words?
I mean like "rush" or like "bush"?
like "rush"
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flush also means parallel or flat against something.