Κάστρο [kastro]
A Castle
Its καστρο (kastro).
Castle is caisleán.
There is a castle near my house!
There are no opposite words for 'castle'.
The Welsh word for 'castle' is castell.
One word. But I think you can write it as two.SandcastleSand castle
I walked into the castle.
The Greek word for experience is εμπειρία (empeiría).
the greek word for egg is: avgo
Castle Wolfenstein. You might get a more serious answer if you were a bit more specific. It's possible you're looking for the word "olympics."
The Greek word for science is: Epistimiand in Greek is written: Επιστήμη