• Safety (term) — defines the concept.
• Safety (topic) — covers the discipline, processes, and related concepts.

This works well because many other entries naturally point to the concept of safety:

• Adverse Event
• Serious Adverse Event
• Suspected Unexpected Serious Adverse Reaction
• Pharmacovigilance
• Risk
• Benefit–Risk Assessment
• Safety Reporting
• Data Monitoring Committee
• Safety Signal