Ensiling is the process of preserving fodder for livestock by sealing it in airtight containers. There are several synonyms for the word "ensiling" that can be used to describe this process, including silage-making, forage preservation, haylage production, and anaerobic fermentation. Silage-making refers specifically to the process of creating silage, which is a type of ensiled forage that has been compressed and stored in a silo. Forage preservation is a broader term that can refer to any method of preserving feed for animals, including drying, ensiling, and baling. Haylage production specifically involves ensiling hay, while anaerobic fermentation refers to the process of breaking down organic matter without oxygen.