@DarkWolf Trouble

What comes once in a minute, twice in a moment, but never in a thousand years?

I join you in battle, fist clenched tight.

We pound three times with all our might.

If my rival decides he will sign for peace;

I'll crush him, and the fight will cease.

But if he lays his hand down flat;

I'll suffer defeat, that is that.

What am I?

I first thought of the black rod in parliament, then dominos. Then my husband came up with what seems to the sensible answer, the rock in rock paper scissors.

People are hired to get rid of me.

I’m often hiding under your bed.

In time I’ll always return you see.

Bite me and you’re surely dead.

What am I?

Could it be mushroom

Toadstool

A cowboy rode into town on Friday, stayed three days, and rode out again on Friday. How did he do that?

The horses name was Friday

Which word becomes shorter when you add 2 letters to it?