"Faint dead away" is a phrase that describes a sudden loss of consciousness or a dramatic reaction to something shocking or surprising. There are several synonyms that can be used to convey a similar meaning. One alternative phrase is "swoon," which suggests a sudden loss of consciousness due to emotional or physical distress. Another synonym is "pass out," which can refer to a sudden loss of consciousness or fainting due to illness or intoxication. "Collapse" can also be used to describe a sudden loss of strength or consciousness. "Blackout" is another term that can be used to describe a sudden loss of consciousness, often due to trauma or alcohol.