The name Ganesha is a Sanskrit compound, joining the words gana (Sanskrit: गण; IAST: gaṇa), meaning a group, multitude, or categorical system and isha (Sanskrit: ईश; IAST: īśa), meaning lord or master. The word gaņa when associated with Ganesha is often taken to refer to the gaņas, a troop of semi-divine beings that form part of the retinue of Shiva (IAST: Śiva). The term more generally means a category, class, community, association, or corporation. Some commentators interpret the name "Lord of the Gaņas" to mean "Lord of Hosts" or "Lord of created categories", such as the elements. Ganapati (Sanskrit: गणपति; IAST: gaṇapati), a synonym for Ganesha, is a compound composed of gaṇa, meaning "group", and pati, meaning "ruler" or "lord". The Amarakosha, an early Sanskrit lexicon, lists eight synonyms of Ganesha : Vinayaka, Vighnarāja (equivalent to Vighnesha), Dvaimātura (one who has two mothers) Gaṇādhipa (equivalent to Ganapati and Ganesha), Ekadanta (one who has one tusk), Heramba, Lambodara (one who has a pot belly, or, literally, one who has a hanging belly), and Gajanana (IAST: gajānana); having the face of an elephant.