dependable
proved
proven
reliable
ascertained
assured
attested
certified
committed
confirmed
constant
decided
dedicated
determinate
determined
devoted
established
faithful
faithworthy
fast
fixed
guaranteed
in the bag
incorruptible
inviolable
made sure
nailed down
on ice
open-and-shut
responsible
secure
set
settled
stated
staunch
steadfast
straight
sure
to be trusted
tried
tried and true
true
trustable
trustworthy
trusty
unfalse
unperfidious
untreacherous
verified
warranted
arrested
bested
breasted
chested
congested
contested
crested
detested
divested
guested
infested
ingested
invested
molested
nested
protested
rearrested
reinvested
requested
rested
retested
suggested
uncontested
unmolested
untested
vested
wrested