con artist

con-man

to con one’s way through

to con someone

He’s a con man

to concede that one is wrong

conceited fool

a conceited ass/jerk

to be a conceited ass

to conceive a plan

to conceive a hope

to concentrate one’s thought and wish on something

A concentrated implementation of technological innovations typically will not get under way before the global economy has gone through a deep crisis

Concern about Zsa Zsa Gabor following stroke

to be concerned with his own interests

He is concerned with earthly things

It concerns only the relations between ...

concierge

to conclude

In conclusion, no evidence was found

concrete jungle

to condemn someone in his absence

to condemn a ship

to be condemned to extinction

on no condition