The phrase "haddest each other" is an old-fashioned way of saying "had each other." There are several synonyms that can be used to convey the same meaning. The most common synonym for this phrase is "had one another," which is often used in modern-day English. Other synonyms include "possessed each other," "owned each other," and "had possession of each other." Each of these synonyms provides a slightly different perspective on the same idea, but they all convey the idea of two people being in some form of possession or ownership of one another. Ultimately, the choice of synonym depends on the context in which the phrase is being used.