There are several synonyms for the word "unholier" that can be used to convey a similar meaning. One such synonym is "profane", which suggests a disregard for religious or moral principles. Another alternative is "impious", which refers to a lack of reverence or respect for a deity or religious beliefs. Additionally, "irreverent" can be used to describe a disrespectful attitude towards something considered sacred. "Sacrilegious" is another synonym that implies a violation or contempt towards religious or sacred objects. These synonyms effectively capture the essence of "unholier", providing alternative ways to describe actions or attitudes that go against religious sanctity.