As I said, lucky guess. From the letters I had and the ones used in the first guess I was stumped. Went and did something else, nothing.
Went and did nerdl and came back to it and thought I'd have to try a double letter and was the first word that popped into my head.
I'd heard of it, wasn't sure of the spelling and still had to look it up after it being correct
As I say, lucky guess !