I have a few problems relating to adjectives that derive from material nouns. Which of the derivatives are correct?
(1) She was wearing a long silver / silvery dress.
(2) She has silky / silken lashes.
(3) He was wearing a good wool / woolly / woollen suit.
(4) She knitted a pair of wool / woolly / woollen socks.
(5) We lived in a wood / wooden house.
I've been thinking a bit more about this. When I said 'woolen' was more adult than 'woolly', I was thinking of the user: a toddler would say 'wooly socks' where an adult would say 'woolen socks'.
But it applies also to the ultimate user of the article, as well as to the user of the word:
She's such a devoted wife; she knits woolen socks for her husband.
She's such a doting grandmother; she knits woolly socks for all her grandchildren.
I'll try to think of other sorts of word that do this....