The enlargement at the end of a bone is called head articulation. It is also otherwise known as costocentral articulations.
A smooth rounded end of the bone is called a condyle.
Condyle
Patella
The epiphysis is the rounded end of a long bone.
A rounded prominence at the end of a bone, most often for articulation with another bone.
Most bone ends are rounded.
The enlargement of bone inside human nose is called the ethmoid bone. It separates the nasal cavity from the brain.
The epiphysis is the rounded end of a long bone, at its joint with adjacent bone.
I think the answer you're looking for is the head.Or it could be the condyles.
Epiphyses is the word used for the distal and proximal ends of long bones. The epiphysis contains red bone marrow.
malleus,ear bone