verb

(of a person’s skin, face, etc.) become red and hot, typically as the result of illness or strong emotion.

Rachel flushed angrily

blush,redden,turn/go pink,turn/go red,turn/go crimson,turn/go scarlet,colour (up),change colour,crimson,tint,burn up,mantle,red,pink,ruddy,glowing,reddish,pinkish,florid,high-coloured,healthy-looking,aglow,burning,flaming,feverish,rubicund,roseate,rosy,blushing,red-faced,blowsy,embarrassed,shamefaced,sanguine,erubescent,rubescent

noun

a reddening of the face, skin, etc., typically caused by illness or strong emotion.

a flush of embarrassment rose to her cheeks

blush,reddening,high colour,colour,rosiness,pinkness,ruddiness,bloom