When it comes to finding synonyms for the term "unzealous", there are a number of words one could use to express that lack of enthusiasm. Some possible options might include words like "apathetic", "indifferent", "unenthusiastic", "disinterested", "cold", "passive", or "complacent". Each of these words conveys a sense of detachment or lack of passion, which could be used to describe someone who is not particularly engaged or invested in their work, hobbies, or relationships. While being unzealous may not be an ideal trait, it is important to remember that not everyone is always equally passionate or enthusiastic about every aspect of their life.