Tal, a word of Hebrew origin, typically means "hill" or "mound." It is often used in Israel to refer to the man-made ancient water reservoirs found throughout the country. However, the word tal has many synonyms that can be used to describe similar physical features. Other words for a hill or mound include knoll, hillock, eminence, summit, or peak. In addition, synonyms for water reservoirs include pond, lake, pool, or tank. Understanding synonyms is an important part of expanding one's vocabulary and can also help to avoid repetition in writing or conversation.