ADHERE, ADHERENCE, ADHESION
If something adheres to something else, it sticks to it firmly.
1. Some sugar grains may adhere to the sides of the pan.
The noun from this sense of adhere is adhesion.
2. It stuck there for seconds only by tactile adhesion.
If someone adheres to a rule, they obey it. If someone adheres to a point of view, they support it strongly.
3. They mostly adhere to a diet which avoids meat.
4. The government has firmly adhered to the view that this is a matter for individuals to decide.
The noun from this sense of adhere is adherence.
5. …a rigid adherence to the laws of honour.
6. …their adherence to the philosophy of social democracy.
• You do not use ‘adhere’ to talk about becoming a member of an organization; you say you ‘join’ an organization.