The term "domain-specific" refers to language or vocabulary that is specific to a particular field or discipline. Among the options you provided, "Shape" is the best example of a domain-specific term, particularly in fields like mathematics, geometry, and design.
- Equilateral could also be considered domain-specific as it relates to geometry (specifically triangles), but it is more of a specific descriptor than a general term.
- Numerous is a general term used in various contexts and is not domain-specific.
- Close is also a general term that can apply to various contexts.
Therefore, while all of these words have particular contexts where they may be used, "Shape" stands out as the most broadly applicable in various domains specifically related to structure and form.