_

• Vacuum (5 C, 39 P)

*

• Materialism (1 C, 24 P)

+

• Materials (41 C, 108 P)
• Physical objects (16 C, 8 P)

A

• Antimatter (2 C, 30 P)
• Atoms (6 C, 24 P)

E

• Exotic matter (3 C, 36 P)

I

• Ions (7 C, 40 P)

M

• Mass (10 C, 64 P)
• Molecules (10 C, 22 P)

P

• Phases of matter (10 C, 70 P)

S

• Subatomic particles (8 C, 11 P)

• Matter

D

• Debris
• Double layer (surface science)

E

• Electroacoustic phenomena

H

• Hardness
• Hylotheism

I

• Interface (matter)

M

• Magnetoactive phase transitional matter
• Matter wave
• Moisture expansion
• Molecule

P

• Physical substance

S

• Surface conductivity