@aidan,
PERSISTENT
Perhaps explanations require some increasingly subtle THEORETICALS. Examples next thing.*
*As a matter of fact Rebecca, before you get too schoolmary on me, I had studied that particular sentence for LACHRYMOSE for longer than usual. I was aware that I had used HOSEPIPE recently in my ongoing story of the aspects of the courtship rituals playful young things in summer often indulge in. But my other choices had Ys in and you must know that I never leave an acronym with any of the last three letters of the alphabet. It's one of the things I do to make my fellow player's, and fellowess playeressie's, lives less insufferable. Not that they notice I don't suppose. The only other suitable word ended in "ing" and if you are concerned about PERSISTANCE after two goes with the HOSEPIPE you should be more concerned about that.
As soon as I see "ing" endings I am thinking of some chap "in Newcastle General" for my campaign on behalf of battered husbands. And I'm not always in the mood for sticking up for them. (I include wallet battering as its contents represent sweat and toil and suffering).
And "ent" is nearly as bad. One finds onself "entering Newcastle tramstation entertaining Nellie's tits" I find.
So I had two good reasons for choosing HOSEPIPE and I trust I will be granted the privilege of your considering them.