While the lake is the largest man-made lake around, some say it is not the state's largest lake, because some of it is in Ohio. The dam that formed the lake on the Shenango River was completed in 1934. The largest man-made lake built by the Army Corps of Engineers in Pennsylvania is Raystown Lake.
postulate (plural postulates) 1  Something assumed without proof as being self-evident or generally accepted, especially when used as a basis for an argument. 2  A fundamental element; a basic principle. ( 3 logic) An axiom. 4  A requirement; a prerequisite.
A postscript is text added at the end of a book or other document. Your textbook is so long that by the time you finish it, you're too exhausted to read the postscript. Postscript comes from the Latin word postscribere, with post meaning after and scribere meaning to write. A postscript especially refers to a note added after the signature of a letter.