CONNIVE, give a look, wink, of secret intelligence.
CONSORT, company, concert.
CONSTANCY, fidelity, ardour, persistence.
CONSTANT, confirmed, persistent, faithful.
CONSTANTLY, firmly, persistently.
CONTEND, strive.
CONTINENT, holding together.
CONTROL (the point), bear or beat down.
CONVENT, assembly, meeting.
CONVERT, turn (oneself).