Some Plants are living organisms that are used for a variety of purposes. Factories, which are 9 letters long, are large buildings or complexes where goods are manufactured. Moles, which are 5 letters long, are small burrowing mammals that live in temperate climates. ANNUALS, which are 7 letters long, are plants that complete their life cycle within one year. Spies, which are 5 letters long, are people who secretly collect information about an enemy or competitor.