Combat (لڑائی) is a 'fight' (لڑنا) or conflict, especially between armed forces.

A colossus (عظیم شخص) is a person or thing of enormous size, importance, or ability. An 'important person' (اہم شخص) of great stature fits this description.

Collusion (ساز باز) is a secret and illegal conspiracy or cooperation, especially to deceive others. 'Connivance' (مجرمانہ چشم پوشی) also means secret, improper cooperation or conspiracy.

Collateral (ضمانت) is something pledged as 'security for a loan' (قرض کے لئے ضمانت), which will be forfeited if the borrower defaults.

Besides being a piece of money, 'to coin' (ایجاد کرنا) a phrase or word means 'to invent' (تخلیق کرنا) or create it.

Coherence (ربط) is the quality of being logical and consistent, where all parts stick together. 'Adherence' (وابستگی) means to stick fast to a substance or belief, sharing the root idea of 'sticking together'.

To be cognisant (واقف) of something means to have knowledge or awareness of it. 'Conversant' (ماہر) means to be familiar with or knowledgeable about, making it a good synonym. 'Unaware' (بے خبر) is the antonym.

A cogent (قائل کرنے والا) argument is one that is clear, logical, and 'convincing' (یقین دلانے والا).

A codicil (ضمنی) is an addition or 'supplement' (اضافہ) that explains, modifies, or revokes a part of a will (legal document).

A codger (سنکی آدمی) is an informal, often affectionate term for an elderly man, especially one who is seen as slightly strange or 'eccentric' (عجیب).