I was going to say 'eudaemons,' but M-W doesn't recognise it...
Yet, strangely, m-w recognizes "eudaemonism". Just more proof of their inconsistency...
I agree about the madness of m-w - do we hate it enough to have a change in reference websites?
There is at least one word that can follow UNSEAMED.
Every site has their foibles, I suppose. Perhaps we should test out all the dictionary sites? Dictionary.com includes more unusual Greek and Latin words; but often skips on dialect, which M-W has. Which is more important?
Anyway, I'll get back to my pen and paper to try to find an answer!
!