A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
fastness
noun
1.
a rate (usually rapid) at which something happens
skeeth
yareness
speed
swiftness
Derived from:
fast
2.
the quality of being fixed in place as by some firm attachment
fixedness
fixity
fixture
secureness
Derived from:
fast
3.
a strongly fortified defensive structure
awork
fasten
fortres
stronghold