Purrageous (Catfinition): an amazing or powerful purr, a purr so strong, it’s felt by humans in their bones, a purr capable of shaking small houses, fracturing window panes, or vibrating objects off shelves.
Usage Note: Contrary to current popular trends, purrageous is not a catonym for fluffrageous or clawrageous.
Michael Seidel, writer 
Sadly, I have no cats with such a purr.
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Well, I find that whether a cat’s issue is purrageous or purravoce, the purr is a relaxing narcotic.
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