Hetair- or latinicized Hetaer- is a Greek linguistic root bearing the meaning of companion (cf. Latin Socii and societas). It is used in the following terms:
Ancient Greece Hetairoi (sing. Hetairos), the name of the Macedonian aristocracy and later Companion cavalry Hetaira (plural Hetairai), female sophisticated companions, courtesans Hetairideia, a festival of Magnesians and Macedonians Hetairiai or Ancient Greek clubs, associations of ancient Greeks who were united by a common interest or goal Hetairia or Andreia, the Cretan terms for Doric Syssitia (common meals) Hetaireios, an epithet of Zeus
Modern Greece Filiki Eteria, a secret 19th century organization whose purpose was to overthrow Ottoman rule over Greece and to establish an independent Greek state The Greek term for company, found in many business names such as Jumbo Anonymi Etairia
Biology Hetaeria, or hairy jewel orchids, a genus in the family Orchidaceae Hetaerina: a genus of damselfly Hetaira (katydid): a genus of bush crickets
Other uses Hetaireia, a Byzantine imperial guard Hetaerism, a theoretical early state of human society that practiced a polyamorous and communistic lifestyle; see Matriarchal religion