"Fifed" is an interesting and unique word that refers to the sound produced by a fife, a small flute-like instrument. However, there are several synonyms that can be used in place of "fifed" to describe similar sounds. These may include words such as toot, whistle, pipe, trill, and chirp. These words can all be used to describe high-pitched, bird-like sounds that are often produced by instruments or small animals. While each of these words may have slightly different connotations or nuances, they can all be effective synonyms for "fifed" when used appropriately in context.