Even the all-you-can-eat buffet could not satisfy his rapacious appetite
Yes, any word is useable in a sentence.
Kenneth was very rapacious when he married into a wealthy family because he had no fortune as a child.
I have decided to clean out my garage next week. - as a verb we are having a clean out at home on the weekend. - as a noun
When I prepare to write a speech, the idea summary will be found in the topic sentence.