Food preservers are people who use various methods to keep food from spoiling. Salters, which is a seven-letter word, are people who use salt to preserve food. Salt has been used for centuries to preserve food, as it helps to draw out moisture and prevent the growth of bacteria. Tins, which is a four-letter word, are containers that are used to store food. Tin cans are airtight and can help to keep food fresh for longer periods of time.