Of course, the ever popular nasal 'i'.
I'll admit to having used all of those words quite comfortably in my writing, but usually not with musical associations. I really have no idea what distinguishes a "pastiche" from a "collage", but I think I like musical collages better than pastiches and sculptural pastiches about the same. I've placed wooden beams and such so that they abut one another, I suppose that someone could do the same thing with musical themes or something. I don't even use "timbre" much in association with music, I think of it as what you test by knocking something with a mallet and listening to the noise it makes.