Luthern is a 7 letter English word. It's valid Scrabble word worth 10 points. It's valid Words with friends word worth 12 points.
You can make 135 anagrams from letters in luthern (ehlnrtu).
First recorded in 1660-70; perhaps alteration of lucarne
I was on the top of the luthern window; and, so far as the inquisitors were concerned, I was safe.
There was a luthern window in it, which opened upon the roof.
It had a bow window on the south side, and three luthern windows in the roof.
About half way between the luthern window and the ridge-pole of the house there was a skylight.
Wren had the advantage of St. Peter's to profit by, and abstained from inserting the "luthern" lights of the larger edifice.
Holding on with one hand at the side of the luthern window, I closed the lower sash, and dropped the upper one.