Capital gain
The profit from selling something for more than you paid for it.
Letter C
Cash flow
The money coming in versus going out over a period. Positive cash flow means you earn more than you spend.
Credit score
A number (usually 300-850) that tells lenders how reliably you repay debt. Higher scores unlock cheaper borrowing.
Compound interest
Earning interest on your interest. Your money grows faster the longer it stays invested.