Configuration

　　Congenial

　　Conglomerate

　　Congregation

　　Consecutive

　　We have flood in three consecutive years.

　　Consensus

　　Conspire

　　Constant

　　Constancy

　　Constellation

　　Constituent

　　=Voter

　　Constitution

　　Constitute

　　Fifty students constitute a class

　　Constrained

　　I am feeling constrained

　　Constraints

　　Container

　　Contend

　　He contends that.

　　Content

　　Contention

　　Contentious

　　== Argumentation

　　Contract illness