Usage patterns
〈物〉を剃刀で剃るto shave (something) with a razor
My father shaves his face with a razor every morning.
剃刀のように〈形容詞〉as sharp/keen as a razor
His words were as sharp as a razor.
〈場所〉に剃刀を当てるto press/apply a razor to (a part of the body)
He carefully applied the razor to his chin to trim his beard.
