mnemonic for memorizing long lists of items in a specific numerical sequence by forming mental associations with a list of words that are already known or can be generated to order.

A popular set of peg-words, easy to remember because they rhyme with the names of the first ten natural numbers, is: one is a bun, two is a shoe, three is a tree, four is a door, five is a hive, six is sticks, seven is heaven, eight is a gate, nine is wine, ten is a hen

see also - method of loci Spaced Repetition