The word "unfaithfuls" refers to individuals who are disloyal or untrustworthy. However, there are various synonyms that can be used to describe such people. One of the most commonly used synonyms is "adulterers", which refers to individuals who engage in extramarital affairs. Another synonym for "unfaithfuls" is "cheaters", which refers to individuals who break a promise or a commitment. "Dishonest" is also a good synonym, referring to individuals who are not truthful or sincere. Other synonyms that can be used to describe "unfaithfuls" include "deceitful", "treacherous", "disloyal", and "double-crossers". All of these words convey negative connotations and describe people who cannot be trusted.