I really liked this question. I think there are differences in these words. I know it made me ponder about the law. I see the Law as being a glass of water and it was filled up as far as it could go. Say there is this uncivilized group of people, when they eat they walk by the pot and stick there hand in and eat. Then the Lord says go and sit at a table from now on. So the people do so. But this isn't enough. They still grab the food with their hands. Now, we have (the cross), and Jesus comes. And he says not only do you sit at the table but now you use siverware. (he actually takes the Law thou shalt not commit adultry and fine tunes it and makes the way even more narrow by saying, don't even think on another woman.)
Okay, he didn't do away with the 1st Law. Now, Jesus died for your sins, past and present. However, he did not die so you could continue in sin. When you sin you break the Law, so he must find that Law valid in order that he still can say the wages of sin is death. This still applies. Some say that Grace saves and it does but Grace means that if you sin against the Law then you must repent. Grace does not work without repentance. And you cannot repent of something is you don't know what you did. So the Law is important that we know what sin is. The Law now through grace and been written on your hearts
Matthew 5:17 Think not that I am come to
destroy the
law, or the prophets: I am not come to
destroy, but to fulfil.
so now he has filled the Law full, the cup is overflowing so he takes the cup of water(Law) and he pours it into an ocean, this way he has not done away with the Law but it is part of the Grace. So are we following the Law when we use silverware? No, we are following Christ, and being obedient to Him. In Him is the Law
“Christ is the end of the law for righteousness to every one that believeth.”......Romans 10:4 Not the end of the law
“For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.” ......Matthew 5:18