I am a floating mountain made entirely of frozen water, hiding nine-tenths of my massive body below the surface of cold ocean waves. What am I?

I am full of cold sweetness, yet I scream silently while melting on your hand.

I hang by the warm fireplace waiting for Santa's gifts, but my name sounds like someone quietly following your every move. What am I?

Why do books never get lost in the forest?

I have an endless supply of sheets, but I never sleep in a bed. What am I?

I am an Irish city along the River Shannon, but I am also a funny five-line poem where the first, second, and fifth lines always rhyme. What am I?

Drop me into the ocean when you want your vacation boat to stay put, but lift me up when you are ready to set sail. What am I?