I was recently tempted to use ensconced as a synonym for entrenched. If you've followed the links, you know how foolish I feel. Entrenched is more an embattled, impervious state of being, whereas ensconced is a pleasant little settled situation. Protection is involved, but, I don't know, it just doesn't seem as ugly.
I like that word, ensconced. It makes me think of scones. There should probably be a more astute observation here, but the whole skull, defensive, protecting, candle-holding etymology just didn't do a lot for me. But scones, entirely unrelated to sconces in any form of diction whatsoever, are much more satisfying. Not so much verbally. They're just really yummy.