Compatibility
- Astrological compatibility
- Backward compatibility
- Biocompatibility
- Blood type
- Compatibilism
- Compatibility (chemical)
- Compatibility (geochemistry)
- Compatibility (mechanics)
- Compatibility card
- Compatibility layer
- Compatibility mode
- Compatible relation
- Computer compatibility
- Consistency
- Electromagnetic compatibility
- Forward compatibility
- Hardware compatibility
- Histocompatibility
- IBM PC compatible
- Interpersonal compatibility
- License compatibility
- Mate choice
- Pin compatibility
- Software compatibility
- Software incompatibility
- Split (phylogenetics)
- Unicode compatibility characters