Jilter is a term that is used to describe someone who cancels or rejects plans or a romantic relationship without any explanation or warning. Some synonyms for jilter include abandoner, deserter, renegade, disloyal, and traitor. Other alternative words include backslider, defector, turncoat, apostate, betrayer, and recreant. These words all convey a sense of betrayal and lack of commitment, and they are useful when describing someone who has broken promises or failed to follow through on their commitments. Whether used in a professional or personal context, these synonyms for jilter can help you express your frustration and disappointment in someone who has let you down.