Loft, a word originally used to describe a room or space in the uppermost part of a building, has various synonyms. Some of the best alternatives for the word 'loft' are attic, garret, mezzanine, and upper-level. Attic, often associated with storage space, is a term used to define the area under the roof of a house. Garret refers to a similar space but is more focused on a smaller and more cramped room within the attic. Mezzanine, on the other hand, is a term that refers to an intermediate level between two main floors of a building. Upper-level refers to the highest level in a building or structure. These synonyms for 'loft' convey a similar concept of an elevated space within a building.