Synonyms of redden
blushWhen you blush, your face becomes redder than usual because you are ashamed or embarrassed.
• I blushed scarlet at my stupidity.
flushIf you flush, your face goes red because you are hot or ill, or because you are feeling a strong emotion such as embarrassment or anger.
• He turned away, his face flushing.
Thesaurus for redden from the Collins English Thesaurus