The term 'Settles a Debt' can be expressed in four different ways, each with a different number of letters. The first is 'Pays' with four letters, which means to give money in exchange for goods or services. The second is 'Repays' with six letters, which means to PAY back a debt or obligation. The third is 'Paysup' with six letters, which is a combination of the words 'PAY' and 'UP' and means to settle a debt in full. The fourth is 'Squares' with seven letters, which means to settle a debt by making an equal exchange. All of these terms refer to the act of settling a debt, either by paying it off in full or by making an equal exchange.