Horned fruit
The name of the yellow fruit with spikes commonly found in tropical regions is called a "durian."
These are not called needles but spikes the spikes get put into the shoe. It's to stop you falling in crosscountry races and slipping on the track.It is actually quite confusing because as well as the shoe being called spikes the jaggy things are called spikes too.
The echidna's spikes are called spines.
That would be either a mace with spikes, or a flail with spikes.
Crampons.
Quills.
The bug that has spikes on its back is called a spiny leaf insect.
There were four spikes at the end of a Stegosaurus's tail that it used as a weapon for self defense. The spikes are called thagomizers.
spines
The black and yellow caterpillar with spikes is called a "cinnabar moth caterpillar."
Metal spikes with a hole at the end through which you pass a rope are typically called "anchor pins" or "eye spikes." These spikes are commonly used in outdoor activities like climbing and caving to secure ropes and create anchor points.
Stalactites and Stalagmites