Instinct. It's a natural warning that you feel.
Green is an adjective in the first one, so put it as a noun. "Green is the mixture of blue and yellow."
Stronger, as coalescing means to come together into one mass. thought it would depend on the sport or strategy for that sport.
Answer : Slime, Murderous, dripping blood, haunted, slaughter, demon and Crime
Explanation : The imagery associated with Grendel which hints at his evil nature are Darkness, murderous, demon, dripping blood, fiend, haunted moors, wild marshes, slaughter, hell, spawned in slime
