Ravaging is the present participle of ravage which means to devastate, destroy, damage and lay waste to something.
"The storm kept ravaging during the night, it ended up capsizing the ship."
Ravishing is the present participle of ravish which means extremely beautiful and outstanding.
"The countess gave me a ravishing smile that kept on lingering in my head."
Ravenous is a colloquial word for starvation. It is a state of being extremely hungry and famished.
"As soon as her husband came back, he started consuming the dinner ravenously."