* Engineering college: This refers to a specific institution of higher education that offers engineering programs. It's a noun phrase naming a place. Examples include "Massachusetts Institute of Technology (MIT)" or "California Institute of Technology (Caltech)." These are *colleges* that happen to offer engineering.
* College of Engineering: This refers to a *department* or *school* within a larger university. It's a noun phrase describing a specific unit within a larger institution. For example, many large universities have a "College of Engineering" (or sometimes "School of Engineering," "Faculty of Engineering," etc.) that houses multiple engineering departments (e.g., Mechanical Engineering, Electrical Engineering, Civil Engineering). The university itself is the broader institution; the College of Engineering is a part of it.
In short: "engineering college" is a type of college; "college of engineering" is a department within a college or university.