Glow-worm is a name given to any insect on the ground that glows, and you can see them at night. Some do look like worms, most are kinds of caterpillar or beetle. Firefly is also a word for the same insects, but glow worm is usually used for glowing insects on the ground, and firefly for glowing insects that fly.
Gluttony describes eating too much food, or eating it too fast, or generally taking far more pleasure in food than you should. Gluttony is one of the seven deadly sins.
Something is described as gnarled if it looks old, knotty and misshapen. Slow-growing trees in very exposed areas often get gnarled. Bonsai trees are deliberately made to look gnarled so they seem older than they are.
Scientific name: suborder: nematocera