As Word wraps line automatically to fit the display and/or printer, there is no end of line symbol.
I assume you mean the end of paragraph symbol (also known as a hard return).
It looks like a backward P with a double upright and the hollow filled in. It is known as a pilcrow or, more commonly, simply as a paragraph mark.
(This differs from HTML, where there are both newline and paragraph marks - the newline is a cranked arrow, down and left, which you may also have on the CR or Enter key of your computer)