Crossword Help Forum
Forum Rules

If plurals are allowed I can add
standbys

Twelfths. decrypts, encrypts?

When I said 25, I'd forgotten about the last 5 letters. Anyway -
Slightly
Brightly
Knightly
Phorphyry
Promptly
Triptych
Catchfly

Depending on which dictionary you use as a reference I can add;
Catchcry
Watchcry
Churchly
Stanchly (a form of staunchly)

Last minute thoughts;
Polygyny

More than I thought, nice reply from all
I think that AB's 'ENCRYPTS' would be a good one to throw back at my friend, I'll ask him to give me another word with 8 letters, with 7 consonants and 1 vowel, with the vowel as the start letter, if he ain't already got it, it could prove to be another teaser 'right back at him'

Cheers all, off to bed, Goodnight

Just read this.
Ethynyls would fit the bill, if a bit obscurely.

http://en.wiktionary.org/wiki/ethynyl#English