Allon is not a very common word in English language, so finding synonyms for it might be a challenge. However, there are a few words that have similar meanings or can be used interchangeably with Allon. Some of these synonyms include "valley," "plain," "lowland," "meadow," and "field." These words all convey a sense of flatness or openness in a natural setting. Another synonym for Allon might be "plateau," which refers to a high, flat area of land. While not all of these words are exact matches for Allon, they all have similar connotations and can be used to loosely describe the same thing.