An opus is an important piece of artistic work by a writer, painter, musician, etc.; an opus can also be one in a series of numbered musical works by the same composer.
An oeuvre is the complete works of a single artist.
When you cooperate with another person, you work together with them to accomplish something.
To operate something is to run it or make it work, such as a machine or a business.
A drama, either tragic or comic, of which music forms an essential part; a drama wholly or mostly sung, consisting of recitative, arias, choruses, duets, trios, etc., with orchestral accompaniment, preludes, and interludes, together with appropriate costumes, scenery, and action; a lyric drama.
The act or process of operating; agency; the exertion of power, physical, mechanical, or moral.
Having the power of acting; hence, exerting force, physical or moral; active in the production of effects; as, an operative motive; operative laws.
(mathematics) a symbol or function representing a mathematical operation
the act of working together
relating to working together
not working or not able to be operated upon
Not operative; not active; producing no effects; as, laws renderd inoperative by neglect; inoperative remedies or processes.
Differentiated vocabulary for your students is just a click away.