Compulsory Definition: something that is required Synonyms: Imperative, Mandatory, Obligatory, Required Antonyms: Discretionary, Elective, Optional, Unimperative

Concentration Definition: close mental attention to something. Synonyms: Absorption, Application, Bringing, Consolidation, Convergence, Accumulation Antonyms: Disregard, Distraction, Inattention, Diffusion, Disperse

Concord Definition: Something harmony or agreement. Synonyms: Unity, Peace, Amity, Accord Antonyms: Variance, Discord, Disagreement

Concrete Definition: something real. Synonyms: Consolidated, Compact, Firm Antonyms: Loose, Shifting, Sloppy

Confess Definition: make something known. Synonyms: Acknowledge, Reveal, Own Antonyms: Deny, Suppress, Disavow, Cover, Hide