quartet, quartette or quartett /kwör-tetˈ/

1. A set of four
2. A composition for four voices or instruments
3. A set of performers or instruments for such compositions

• octuplicates
• octupling
• ocular
• ocularist
• ocularists
• ocularly
• oculars
• oculate
• oculated
• oculi
• oculist
• oculists
• oculo-
• oculomotor
• oculus
• od
• OD
• oda
• ODA
• odal
• odalique
• odaliques
• odalisk
• odalisks
• odalisque