Lecanora is a genus of lichen fungi that includes different species with varying morphological characteristics. Synonyms of the word Lecanora can be used to refer to other closely related genera of lichen, such as Xanthoparmelia, Rhizoplaca, and Buellia. These genera share some similarities with Lecanora, but they have their distinct features that set them apart. For example, Xanthoparmelia has a yellowish-green and grayish-brown thallus, while Rhizoplaca has a brownish-orange or yellowish-brown thallus. Buellia, on the other hand, has a blackish or brownish disk-shaped fruiting body. The use of synonyms for Lecanora ensures that there is no ambiguity in the identification of lichens.