A,B,C...

A: absorb (energy)
B:(not) brittle,
C:crack, Charpy
D:deformation, diamonds
E:energy, endurance
F:fracture
G:glasses
H:Hooke, hardness
I:impact test
J:Joule
K: Kevlar fibre
L: LDPE
M:material, metal, mental
N:nickel
O:obstinancy
P:plastic deformation, polymers,  psychological
Q:quality
R:resistance, reinforcement
S:stress
T:tensile test, temperature
U: UHMWPE fiber
V: volume (units of energy per volume)
W:will, weakness, wood
Y:Young's Modulus, Yeld stress