Cash alternative refers to any form of payment that can be used instead of cash. PLASTIC, CARD, CHECK, CHARGE, CREDIT, IOU, checkbook, and chargecard are all examples of cash alternatives. PLASTIC is a seven-letter word for a type of payment CARD, such as a debit or CREDIT CARD. CARD is a four-letter word for a type of payment CARD, such as a gift CARD. CHECK is a five-letter word for a type of paper document used to make payments. CHARGE is a six-letter word for a type of payment CARD, such as a store CREDIT CARD. CREDIT is also a six-letter word for a type of payment CARD, such as a CREDIT CARD. IOU is a three-letter acronym for 'I owe you, ' which is an informal agreement between two people to pay back a debt. Checkbook is a nine-letter word for a book of paper checks. Chargecard is a ten-letter word for a type of payment CARD, such as a store CHARGE CARD.