1. The following words can be preceded by five different, but related words:

_ _ _ _ FALL
_ _ _ _ STONE
_ _ _ _ BALL
_ _ _ _ MILL
  _ _ _  HORN

2. Is it fair to say that in every belief there is a lie?

3. What is unusual about the words PLUS and MINUS?

4.The following words share a very unusual quality. Can you determine what it is?

WHAT / HOLE / ALES / TEST

HINT:
4. This only works with the words in this order.

Answers:

1. RAIN/HAIL/SNOW/WIND/FOG

2. Only if you mean beLIEf 

3. By exchanging the last letter of PLUS with the first letter of MINUS, you get PLUM and SINUS.

4. If you take each corresponding letter from each word, the same words are formed again:

What   Hole   Ales   Test
wHat   hOle   aLes   tEst
whAt   hoLe   alEs   teSt
whaT  holE    aleS    tesT