Prostrate is an adjective meaning lying face down, and a verb (usually reflexive) meaning to put or throw face down. Prostate is a noun denoting a gland in male mammals that controls the release of urine and creates a milky fluid that constitutes a large percentage of the volume of semen.
Examples
The Fiver’s never been one to prostrate itself before the altar of the Big Buck and acquiesce to the wishes of sponsors. [Guardian]
The Da Vinci surgical robot made by Intuitive Surgical is changing the way many doctors perform surgeries like prostate removal. [Forbes]
He jokes that Muslims do their public image no favor by prostrating themselves in their daily worship. [New York Daily News]