ADJ

combustible, flammable, hazardous, inflammable, radioactive, toxic
recyclable
man-made

ADJ

raw
Higher raw material costs have pushed up the price of many manufactured goods
industrial
building
a storeroom full of building materials
drawing, writing
Prisoners were not allowed writing materials

ADJ

thick, thin
coarse, fine
woven

QUANT

length, piece, roll, scrap, strip
A patchwork quilt is a good way of using up scraps of material

ADJ

fascinating, good, relevant, useful
source
The letter were used as source material in this new biography
classified, confidential, sensitive
unpublished
educational, instructional, promotional, teaching
biographical, historical
indecent, obscene, pornographic
He was convicted of importing indecent material

VERB + MATERIAL

collect, find, gather, get hold of
He's collecting material for a new book on space travel. I can't find any relevant material on him in the library
contain, include
This new biography contains a wealth of previously unpublished material
produce, publish

PREP

~ for
useful material for a documentary
~ on
original material on the First World War