The phrase "contract a marriage" is a common way of referring to the act of getting married. However, there are many other synonyms you can use that convey the same meaning. Some of these include "tie the knot," "say 'I do,'" "get hitched," "enter into matrimony," "get married," "take one's vows," "unite in wedlock," "bind oneself in wedlock," and "pledge one's troth." No matter which synonym you choose, they all refer to the same joyous occasion of two people committing to spend the rest of their lives together in love and partnership.