There are several synonyms for the phrase "lacking reverence for God". Some of these include irreverence, impiety, blasphemy, sacrilege, profanity, and godlessness. Irreverence refers to a lack of respect or veneration towards something sacred or holy. Impiety, synonymously, denotes a lack of devotion or reverence towards religious ideals. Blasphemy refers to speaking disrespectfully or irreverently on religious or sacred matters. Sacrilege involves violating or desecrating something holy or sacred. Profanity refers to language or behavior that is disrespectful towards religious or sacred beliefs. Godlessness refers to a complete absence of religious or spiritual beliefs.