General:
* Sprig: A small twig or branch, especially one with leaves or flowers.
* Shoot: A new growth of a plant, especially a young twig or branch.
* Bough: A branch of a tree, especially a large one.
* Branchlet: A small branch of a tree or shrub.
* Stem: The main stalk of a plant, which may include twigs.
* Stick: A slender piece of wood, which can be a twig.
Descriptive:
* Slender: Thin and delicate.
* Brittle: Easily broken.
* Withered: Dried up and lifeless.
* Knotty: Full of knots or bumps.
* Barked: Covered in bark.
* Leafy: With leaves attached.
Figurative:
* Whisp: A very thin and fragile twig, like a whisper of a branch.
* Nib: A small, pointed twig, like a nib on a pen.
* Spindle: A long, slender twig, like a spindle for spinning yarn.
The best word to use will depend on the specific context of your writing.
For example, if you're writing about a delicate twig in a bird's nest, you might use the word "whisp." If you're writing about a sturdy branch used for firewood, you might use the word "stick."