adherence

(noun) faithful support for a cause or political party or religion. Synonyms: attachment, adhesion. Examples: "Attachment to a formal agenda." "Adherence to a fat-free diet." "The adhesion of seville was decisive."

(noun) the property of sticking together (as of glue and wood) or the joining of surfaces of different composition. Synonyms: adhesiveness, adhesion, bond. Examples: "The mutual adhesiveness of cells." "A heated hydraulic press was required for adhesion."