UnScramble this Word: a s i l e b i?

Questions

What black basalt slab, found by Napoleons soldiers iin Egypt was the key to the translation of Egyptian hieroglyphic writing?

Which king led the Huns from 445 to 450 AD?

What was the name for the wooden head of a woman with a clay pipe in her mouth at fairs?

What is a taipan?

Which term for Ireland was first used by Dr Drennan in his poem Erin?