difference between consulting and consultancy [closed]

What is the difference between consulting and consultancy, if I want to talk about the activity of consultant? Should I say consulting services or consultancy services ?

Many thanks in advance. FF

Solution 1:

Consultancy is a noun while consulting is an adjective. Here are Oxford's entries:

consultancy (noun)
A professional practice that gives expert advice within a particular field

consulting (adj.)
Engaged in the business of giving expert advice to people working in a professional or technical field

The definitions are very close, but consulting is the better word. This is because it is directly describing the type of service.

Consultancy is not directly describing the type but instead saying the services are of a consultancy—a minor difference but a difference nonetheless. In the consultancy case, it's more correct to say the consultancy's services.