The term 'at no charge' can be expressed in four different ways using crossword solutions. The first solution is 'FREE' which is a four letter word meaning without cost or payment. The second solution is 'CASH' which is also a four letter word meaning money in the form of coins or banknotes. The third solution is 'GRATIS' which is a six letter word meaning without charge or cost. The fourth solution is 'forfree' which is a seven letter word meaning without cost or payment. The fifth solution is 'costfree' which is an eight letter word meaning without cost or expense. All of these solutions refer to the same concept of something being provided without any cost or payment.