As far as I know the suffix -ish can be added to the end of lots of nouns. (I think it's used mostly in BrE, and not in standard English, of course.) (Please correct me if I've got it wrong.)
Can I say "tullish" for a kind of dress made of tulle?
Thanks a lot.
Or, maybe, just "sheer skirt", "sheer socks", etc.?!
The adjective would depend on the stiffness of the fabric and how decorative it is, I suppose. Is it a fluid, veil-like tulle, or a crisp, lacy tulle--with a lining, I assume. (You'll notice I just used some adjectives for tulle, as you requested). You can always refer to it as a tulle dress, just as you could refer to a dress made of silk as a silk dress. The names of fabrics often are used both as adjectives and as nouns.