For Unity:
* Cohesion: The act of sticking together or forming a united whole.
* Harmony: A state of agreement or balance.
* Concord: Agreement or harmony between people or groups.
* Solidarity: Unity or agreement of feeling or action, especially among individuals with a common interest.
* Consonance: Agreement or compatibility between opinions or actions.
* Integration: The act of combining parts to form a whole.
For Practice:
* Expertise: Skill or knowledge in a particular field.
* Mastery: Complete control or skill in a particular area.
* Proficiency: Skill in a particular activity or area of knowledge.
* Competence: The ability to do something successfully or efficiently.
* Discipline: The practice of training oneself to obey rules or a code of behaviour.
* Application: The act of putting something into practice.
Combining Unity and Practice:
* Synergy: The interaction or cooperation of two or more organizations, substances, or other agents to produce a combined effect greater than the sum of their separate effects.
* Collaboration: The action of working with someone to produce or create something.
* Teamwork: The combined effort of a group of people working together.
* Synchronization: The act of bringing together or coordinating different actions or elements.
The best choice will depend on the specific context you are using it in.