Answer:
Lots of them make up a word, And lots of words are in them. It's easy when you think about it. A while ago we stamped and mailed them.
The profession of Jimi Hendrix and Eric Clapton
The more you look at it, The less you see.
What is it that no man ever saw, which never was, but always will be?
There are four of these, but everyone's favorite seems to be spades.
A doctor might remove one from the neck of a Dracula victim.