Answer:
I am a ship that can be made to ride the greatest waves. I am not built by objects but built by minds.
I am a bow that can never be tied or broken but can disappear. What am I?
I have 24 keys but cannot open any locks. Sometimes loud sometimes soft
Born of sorrow, grows with age, you need a lot to be a sage. What is it?
I am the only word that looks the same when spelled upside down.
What language does a billboard speak?