frame-work

(noun) a hypothetical description of a complex entity or process. Synonyms: model, theoretical account, framework. Example: "The computer program was based on a model of the circulatory and respiratory systems."

(noun) the underlying structure. Synonyms: framework, fabric. Examples: "Providing a factual framework for future research." "It is part of the fabric of society."

(noun) a structure supporting or containing something. Synonyms: framework.