Conceivable p11. paragraph 1
Henry Green was ........of the world.
I think:  Adjective- as many ways as possible that you can think of.
Actual:  Adverb- to form an idea
This word is used to tell the reader that Henry likes chocolate in any way shape or form.

Hijacking p11 paragraph 2
And then.....unusual hijacking.
I think it is a verb which means to steal a vehicle or means of transportation.
Actual:  Verb- to steal a vehicle especially one on the road.
This word is used to add to the plot of the story.