colossal

very big; enormous

creature

a living being; especially an animal

heroic

very brave or daring

horrifying

causing much fear

monstrous

extremely large; enormous

terrifying

causing much fear

tremendous

very great, large, or powerful

irrestible

impossible to stay away from

ancient

very old

crater

the hole in the top of a volcano

dreadful

causing much fear

fiery

very hot, like a fire

etched

clearly or firmly fixed

confident

feeling sure of oneself