Just came back to finish this off but find myself with a bit of a problem.
So far for the nouns I've got 30 cells from...
P...... - ....E
A..H
R...R
C.....S
S.A
This means I'm missing a noun that, according to Malone begins and end in S
My final adjective is 7 letters and begins and ends in S but it's only "shaded" ironically or as a pun, pehaps - is that what is meant or am I missing something obvios?