Thank God is a commonly used expression of gratitude. However, there are many synonyms for this popular phrase. People may use expressions like 'praise the Lord', 'blessed be', 'hallelujah', or 'thank goodness'. Other synonyms for thank God are 'grateful', 'appreciative', 'obliged', or 'indebted'. Depending on the situation, consider using alternatives like 'thanks a million', 'I owe you', or 'much obliged'. Additionally, consider other variations like 'thank heavens', 'thanks to the Almighty', or 'thank the stars'. So, whether you are expressing gratitude for something big or small, there are many ways to say 'thank you' to God or anyone else who deserves the credit.