Choose one word that substitutes the highlighted words.

Some religious groups follow the custom of having multiple wives. 

Polygamy

The word that best substitutes the highlighted words is polygamy.

• Misogamy is the hatred of marriage or the institution of marriage.
• Bigamy is the act of marrying two people at the same time.
• Polygamy is the practice of having multiple spouses.
• Monogamy is the practice of having one spouse at a time.