In Return of the Jedi, Luke says to Vader:
That was why you couldn't destroy me. That's why you won't take me to your emperor now.
Later, the Emperor says to Luke:
If you will not be turned, you will be destroyed.
And in The Phantom Menace, Mace Windu says with regard to the apparent death of Darth Maul:
But which was destroyed? The master, or the apprentice?
Perhaps most famously (as @Adamant reminded me), Vader in The Empire Strikes Back:
There is no escape. Don't make me destroy you.
And later in the same fight:
Luke, you can destroy the Emperor. He has foreseen this!
That's enough to establish a pattern. Why do these characters consistently say "destroy" instead of "kill"? It is just a peculiar force-user mannerism/tradition, or is there some underlying spiritual significance to their choice of words? Am I correct in my presumption that this pattern is exclusive or nearly exclusive to force-users?
Note that there are several places in the scripts where the word "destroy" is used where "kill" would not be a suitable replacement, for example when discussing the destruction of a planet, a ship, or a droid (it's not obvious whether droids are alive to begin with). Those usages of the word "destroy" are not relevant to the question.
I am also aware that there are occurrences of force-users not using the word destroy, such as when Obi-Wan tells Luke that Vader "betrayed and murdered [his] father." That doesn't invalidate the question unless someone can prove that the usages of "destroy" noted above are not statistically significant.
Edit: if there's a simple out-of-universe explanation such as censorship, that's a valid answer as long as it can be backed up by specific evidence. However, I am skeptical of this due to several uncensored usages of the word "kill" in those same movies:
Send a distress signal, and then inform the senate that all aboard were killed!
You'd have been killed, too, and the droids would be in the hands of the Empire.
But they're going to kill her!
If you put him in there, it might kill him.
He told me enough! He told me you killed him!
I can't kill my own father.
I will not turn... and you'll be forced to kill me.
And perhaps most perplexing/telling of all:
You couldn't bring yourself to kill me before, and I don't believe you'll destroy me now.
It seems as if characters are more likely to use "destroy" instead of "kill" when the person being destroyed and/or killed is a force user. But even if that's correct, it doesn't explain why they use this language.