The Word 'bone' is a common noun; a Word for any bone of any person or animal.
A proper noun is the name of a specific person, place, thing, or a title; for example:
- Dr. Bone & the Hepcats, New Orleans Jazz band
- Bone Regency, South Sulawesi Province of Indonesia
- Bone Street, Gainesville, TX or West Bone Street, Bethel, OH
- "Bone", limited edition comic book series by Jeff Smith
- "Bones: A Forensic Detective's Casebook" by Dr. Douglas Ubelaker and Henry Scammell