Acers are a type of deciduous tree, also known as the maple tree. There are many synonyms for the word "acers," including maple, maple tree, Aceraceae family, Aceridae, and Aceraceae. All of these synonyms are used to refer to various aspects of this popular and useful tree species. Maple is a common synonym for acers, as it is the most popular type of maple tree in North America. Aceridae refers to the order of insects called the maple webworms, which feed on the leaves of the maple tree. And the Aceraceae family refers to the broader group of plant species to which acers belong.