This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. Alternative form of hetaerism‎.

n. A supposed primitive state of society, in which all the women of a tribe were held in common.

"These might indeed occur between a man and a woman outside marriage, but putting aside the very limited phenomena of Athenian hetairism, they were too shameful to be idealized."

hetarism