materials and material science (nouns and adjectives)

3. Matter, material, articles, or activities of a specified or indeterminate kind that are being referred to, indicated, or implied.
5. Not able to be seen through; not transparent.
6. A light touch or stroke, usually with the flat of the hand.
9. An act of striking or hitting someone or something; a movement of a pen, pencil, or paintbrush.
12. A substance or object that is firm and stable in shape; not a liquid or fluid.
13. A tiny spot or particle of something.
16. Firm and stable in shape; not liquid or fluid.
18. Made by chemical synthesis, especially to imitate a natural product.
20. A small, hard seed, especially of a food plant such as wheat, rice, or corn.
21. A situation in which people or things are crowded together; a vegetable.
22. A particular kind of matter with uniform properties.
24. Allowing light to pass through so that objects behind can be distinctly seen.
27. Having a solid, almost unyielding surface or structure.
28. A solid inorganic substance of natural occurrence.
32. A small fragment of dried bread, cake, or cracker.
33. A drop of clear salty liquid secreted from glands in the eye.
34. A substance used to give something a smooth and shiny surface when rubbed.

1. Hard but liable to break or shatter easily.
2. Having a hole or empty space inside.
4. The force that attracts a body toward the center of the earth, or toward any other physical body having mass.
6. A heap of things laid or lying one upon another.
7. The resistance that one surface or object encounters when moving over another.
8. Easily broken or damaged; delicate.
10. Closely and neatly packed together; dense.
11. Having the properties of a liquid; flowing freely.
14. A crowd of people pressed closely together.
15. Closely packed together; thick.
16. The act of scrubbing something.
17. A small, thin piece of something that has come off a larger piece.
18. A neat pile of things.
19. The feel, appearance, or consistency of a surface or a substance
23. A mark or slight cut made on a surface.
25. Rigid; not easily bent or moved.
26. (of a liquid) made thinner or weaker by having water or another solvent added to it.
27. A cloth or material woven or knitted from yarn.
29. A substance that flows freely but is of constant volume, like water or oil.
30. A compact mass of a substance, typically without a definite or regular shape.
31. A hollow container used to give shape to molten or hot liquid material when it cools and hardens.