Answer:
What word is a plural, but when you add an "S" to the end, it becomes singular?
Die without me, never thank me. Walk right through me, never feel me. Always watching, never speaking. Always lurking, never seen.
What is that over the head and under the hat?
With pointed fangs it sits in wait. With piercing force it doles out fate, over bloodless victims proclaiming its might. Eternally joining in a single bite.
What measures out time until in time all is smashed to it?
What covers its face with its hands, speaks no language, yet most known what it's saying?