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