magnum opus /magˈnəm ōˈpəs, magˈnŭm opˈŭs/ (Latin)

1. A great work, esp of literature or learning
2. A writer's greatest achievement or the culmination of his or her efforts

• omnibenevolent
• omnibus
• omnibus book
• omnibus books
• omnibus box
• omnibus boxes
• omnibus clause
• omnibus clauses
• omnibus edition
• omnibus editions
• omnibuses
• omnibus train
• omnibus trains
• omnicompetence
• omnicompetences
• omnicompetent
• omnidirectional
• omnidirectionality
• omnidirectionally
• omnieties
• omniety
• omnifarious
• omnifariously
• omnifariousness
• omniferous