νόμος is the common word meaning law. It may mean law in general. In the N.T., however, it usually means the law of God, and most frequently the Mosaic law. θεσμός is law considered with special reference to the authority on which it rests. ἐντολή is more specific, being used of a particular command. δόγμα is an authoritative conclusion, a proposition which it is expected that all will recognize as universally binding.