Horned fruit
African Horned Cucumber
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.
Cactus spikes are commonly referred to as spines or thorns. These structures are modified leaves designed to protect the cactus from predators and reduce water loss.
Crampons.
Quills.
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
prongs or tines
Cletes
A trench club.
proll