Needle
Down
The zebra mainly eats stiff stems of corns,leaves,and twigs
awn
In men's formal wear a stiff pleated collar is called a Imperial/Poke collar
Rigor mortis is dead stiff body, not really called posturing.
Membranes do not have a stiff outside. I suspect the answer you are looking for is the cell wall, which is a stiff structure found outside the cell membrane of a plant cell, but separate from it.
nuchal rigidity
Cell wall
yes because it turns stiff
Stiff bristle grass has many common names, including foxtail. That scientific name is Setaria viridis.
Barley bristle is called Awn.
The long stiff flight feathers on a bird's wing are called remiges. They provide the necessary lift and thrust for the bird to fly efficiently.