The phrase "at hand" refers to something that is within reach or readily available. There are a variety of synonyms that can be used to convey the same idea, such as "close by," "nearby," or "within arm's reach." Other options might include "accessible," "within reach," or "within easy reach." Each of these phrases communicates the sense that something is easily obtainable or reachable, and can be used in a variety of contexts. Whether you are referring to materials in a workshop, tools in a kitchen, or information in a database, using a synonym for "at hand" can add variety and precision to your language.