Surface and texture
Run a leaf between two fingers and you are testing for these three. They are adjectives of surface rather than shape, and all three end in a suffix English pronounces nothing like it writes.
Three surfaces
glaucous
GLAW-kus/Covered in a fine blue-grey waxy bloom that rubs off under a thumb. The bloom on a plum, on a red cabbage leaf, on a eucalyptus twig.
6 heard spellings on file
coriaceous
ko-ree-AY-shus/Leathery. A blade thick and stiff enough to keep its shape when you bend it, as in holly, laurel, camellia and most evergreen rhododendrons.
6 heard spellings on file
pubescent
pyoo-BESS-unt/Covered in short soft hairs, downy to the touch. Mullein and many sages are pubescent enough to feel like felt.
5 heard spellings on file
All three appear in plant descriptions far beyond leaves. A stem, a fruit and a seed pod can each be glaucous, coriaceous or pubescent.