To be camouflaged is to be hidden from view. You can be camouflaged by blending in with your surroundings or by wearing a disguise.
Bulbous is a word that is used to describe something that is round and large. Examples of things that are usually described as bulbous are the heads of elephants, the heads of whales, and the heads of humans.
Buttresses are pieces of architecture that support the weight of a building. They are usually made out of stone or brick, and they help to keep the building stable.
To hollow out is to make something hollow, to make it have a hole or a space inside. When you hollow out a tree, you make a hole in it so that you can get at the wood inside.
When something is chunkier, it is bigger or thicker than normal. Chunkier things are often easier to handle or to eat.
Rattlesnakes are a type of snake that can be very dangerous. They have a rattle on their tail that helps them scare away their prey.