1. Coinciding exactly when superimposed
   - identical

See also: congruent

• Sinkiang
• sinking
• sinking feeling
• sinking fund
• sinking spell
• sinless
• sinlessness
• Sinn Féin
• sinner
• sinning
• Sinningia
• Sinningia speciosa
• Sino-
• Sino-Japanese War
• Sino-Tibetan
• Sino-Tibetan language
• sinoatrial node
• Sinologist
• Sinology
• sinoper
• sinopia
• sinopis
• Sinornis
• sinter
• sintered