A clash or disagreement, often violent, between two or more opposing groups or individuals.
An incompatibility, as of two things that cannot be simultaneously fulfilled.
To overlap (with), as in a schedule.
To be at odds (with); to disagree or be incompatible
Benefits resulting from combining different groups, people, objects or processes.
The cooperation of two or more nerves, muscles, organs, etc.
A synonym of binding energy.
The combined action of two or more drugs where the effects are stronger than their mere sum.